20921280

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:107

約数の個数: 224

約数和(自身を含む): 74127360

約数和(自身を除く): 53206080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 19, 20, 24, 30, 31, 32, 37, 38, 40, 48, 57, 60, 62, 64, 74, 76, 80, 93, 95, 96, 111, 114, 120, 124, 148, 152, 155, 160, 185, 186, 190, 192, 222, 228, 240, 248, 285, 296, 304, 310, 320, 370, 372, 380, 444, 456, 465, 480, 496, 555, 570, 589, 592, 608, 620, 703, 740, 744, 760, 888, 912, 930, 960, 992, 1110, 1140, 1147, 1178, 1184, 1216, 1240, 1406, 1480, 1488, 1520, 1767, 1776, 1824, 1860, 1984, 2109, 2220, 2280, 2294, 2356, 2368, 2480, 2812, 2945, 2960, 2976, 3040, 3441, 3515, 3534, 3552, 3648, 3720, 4218, 4440, 4560, 4588, 4712, 4960, 5624, 5735, 5890, 5920, 5952, 6080, 6882, 7030, 7068, 7104, 7440, 8436, 8835, 8880, 9120, 9176, 9424, 9920, 10545, 11248, 11470, 11780, 11840, 13764, 14060, 14136, 14880, 16872, 17205, 17670, 17760, 18240, 18352, 18848, 21090, 21793, 22496, 22940, 23560, 27528, 28120, 28272, 29760, 33744, 34410, 35340, 35520, 36704, 37696, 42180, 43586, 44992, 45880, 47120, 55056, 56240, 56544, 65379, 67488, 68820, 70680, 73408, 84360, 87172, 91760, 94240, 108965, 110112, 112480, 113088, 130758, 134976, 137640, 141360, 168720, 174344, 183520, 188480, 217930, 220224, 224960, 261516, 275280, 282720, 326895, 337440, 348688, 367040, 435860, 523032, 550560, 565440, 653790, 674880, 697376, 871720, 1046064, 1101120, 1307580, 1394752, 1743440, 2092128, 2615160, 3486880, 4184256, 5230320, 6973760, 10460640, 20921280]

約数ペア:

[(1, 20921280), (2, 10460640), (3, 6973760), (4, 5230320), (5, 4184256), (6, 3486880), (8, 2615160), (10, 2092128), (12, 1743440), (15, 1394752), (16, 1307580), (19, 1101120), (20, 1046064), (24, 871720), (30, 697376), (31, 674880), (32, 653790), (37, 565440), (38, 550560), (40, 523032), (48, 435860), (57, 367040), (60, 348688), (62, 337440), (64, 326895), (74, 282720), (76, 275280), (80, 261516), (93, 224960), (95, 220224), (96, 217930), (111, 188480), (114, 183520), (120, 174344), (124, 168720), (148, 141360), (152, 137640), (155, 134976), (160, 130758), (185, 113088), (186, 112480), (190, 110112), (192, 108965), (222, 94240), (228, 91760), (240, 87172), (248, 84360), (285, 73408), (296, 70680), (304, 68820), (310, 67488), (320, 65379), (370, 56544), (372, 56240), (380, 55056), (444, 47120), (456, 45880), (465, 44992), (480, 43586), (496, 42180), (555, 37696), (570, 36704), (589, 35520), (592, 35340), (608, 34410), (620, 33744), (703, 29760), (740, 28272), (744, 28120), (760, 27528), (888, 23560), (912, 22940), (930, 22496), (960, 21793), (992, 21090), (1110, 18848), (1140, 18352), (1147, 18240), (1178, 17760), (1184, 17670), (1216, 17205), (1240, 16872), (1406, 14880), (1480, 14136), (1488, 14060), (1520, 13764), (1767, 11840), (1776, 11780), (1824, 11470), (1860, 11248), (1984, 10545), (2109, 9920), (2220, 9424), (2280, 9176), (2294, 9120), (2356, 8880), (2368, 8835), (2480, 8436), (2812, 7440), (2945, 7104), (2960, 7068), (2976, 7030), (3040, 6882), (3441, 6080), (3515, 5952), (3534, 5920), (3552, 5890), (3648, 5735), (3720, 5624), (4218, 4960), (4440, 4712), (4560, 4588)]