21509760

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{659}}^1$

素因数の和:698

約数の個数: 128

約数和(自身を含む): 72705600

約数和(自身を除く): 51195840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 48, 51, 60, 64, 68, 80, 85, 96, 102, 120, 128, 136, 160, 170, 192, 204, 240, 255, 272, 320, 340, 384, 408, 480, 510, 544, 640, 659, 680, 816, 960, 1020, 1088, 1318, 1360, 1632, 1920, 1977, 2040, 2176, 2636, 2720, 3264, 3295, 3954, 4080, 5272, 5440, 6528, 6590, 7908, 8160, 9885, 10544, 10880, 11203, 13180, 15816, 16320, 19770, 21088, 22406, 26360, 31632, 32640, 33609, 39540, 42176, 44812, 52720, 56015, 63264, 67218, 79080, 84352, 89624, 105440, 112030, 126528, 134436, 158160, 168045, 179248, 210880, 224060, 253056, 268872, 316320, 336090, 358496, 421760, 448120, 537744, 632640, 672180, 716992, 896240, 1075488, 1265280, 1344360, 1433984, 1792480, 2150976, 2688720, 3584960, 4301952, 5377440, 7169920, 10754880, 21509760]

約数ペア:

[(1, 21509760), (2, 10754880), (3, 7169920), (4, 5377440), (5, 4301952), (6, 3584960), (8, 2688720), (10, 2150976), (12, 1792480), (15, 1433984), (16, 1344360), (17, 1265280), (20, 1075488), (24, 896240), (30, 716992), (32, 672180), (34, 632640), (40, 537744), (48, 448120), (51, 421760), (60, 358496), (64, 336090), (68, 316320), (80, 268872), (85, 253056), (96, 224060), (102, 210880), (120, 179248), (128, 168045), (136, 158160), (160, 134436), (170, 126528), (192, 112030), (204, 105440), (240, 89624), (255, 84352), (272, 79080), (320, 67218), (340, 63264), (384, 56015), (408, 52720), (480, 44812), (510, 42176), (544, 39540), (640, 33609), (659, 32640), (680, 31632), (816, 26360), (960, 22406), (1020, 21088), (1088, 19770), (1318, 16320), (1360, 15816), (1632, 13180), (1920, 11203), (1977, 10880), (2040, 10544), (2176, 9885), (2636, 8160), (2720, 7908), (3264, 6590), (3295, 6528), (3954, 5440), (4080, 5272)]