21085440

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:77

約数の個数: 216

約数和(自身を含む): 75300960

約数和(自身を除く): 54215520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 19, 20, 24, 30, 32, 34, 38, 40, 48, 51, 57, 60, 64, 68, 76, 80, 85, 95, 96, 102, 114, 120, 128, 136, 152, 160, 170, 190, 192, 204, 228, 240, 255, 256, 272, 285, 289, 304, 320, 323, 340, 380, 384, 408, 456, 480, 510, 544, 570, 578, 608, 640, 646, 680, 760, 768, 816, 867, 912, 960, 969, 1020, 1088, 1140, 1156, 1216, 1280, 1292, 1360, 1445, 1520, 1615, 1632, 1734, 1824, 1920, 1938, 2040, 2176, 2280, 2312, 2432, 2584, 2720, 2890, 3040, 3230, 3264, 3468, 3648, 3840, 3876, 4080, 4335, 4352, 4560, 4624, 4845, 4864, 5168, 5440, 5491, 5780, 6080, 6460, 6528, 6936, 7296, 7752, 8160, 8670, 9120, 9248, 9690, 10336, 10880, 10982, 11560, 12160, 12920, 13056, 13872, 14592, 15504, 16320, 16473, 17340, 18240, 18496, 19380, 20672, 21760, 21964, 23120, 24320, 25840, 27455, 27744, 31008, 32640, 32946, 34680, 36480, 36992, 38760, 41344, 43928, 46240, 51680, 54910, 55488, 62016, 65280, 65892, 69360, 72960, 73984, 77520, 82365, 82688, 87856, 92480, 103360, 109820, 110976, 124032, 131784, 138720, 155040, 164730, 175712, 184960, 206720, 219640, 221952, 248064, 263568, 277440, 310080, 329460, 351424, 369920, 413440, 439280, 527136, 554880, 620160, 658920, 702848, 878560, 1054272, 1109760, 1240320, 1317840, 1405696, 1757120, 2108544, 2635680, 3514240, 4217088, 5271360, 7028480, 10542720, 21085440]

約数ペア:

[(1, 21085440), (2, 10542720), (3, 7028480), (4, 5271360), (5, 4217088), (6, 3514240), (8, 2635680), (10, 2108544), (12, 1757120), (15, 1405696), (16, 1317840), (17, 1240320), (19, 1109760), (20, 1054272), (24, 878560), (30, 702848), (32, 658920), (34, 620160), (38, 554880), (40, 527136), (48, 439280), (51, 413440), (57, 369920), (60, 351424), (64, 329460), (68, 310080), (76, 277440), (80, 263568), (85, 248064), (95, 221952), (96, 219640), (102, 206720), (114, 184960), (120, 175712), (128, 164730), (136, 155040), (152, 138720), (160, 131784), (170, 124032), (190, 110976), (192, 109820), (204, 103360), (228, 92480), (240, 87856), (255, 82688), (256, 82365), (272, 77520), (285, 73984), (289, 72960), (304, 69360), (320, 65892), (323, 65280), (340, 62016), (380, 55488), (384, 54910), (408, 51680), (456, 46240), (480, 43928), (510, 41344), (544, 38760), (570, 36992), (578, 36480), (608, 34680), (640, 32946), (646, 32640), (680, 31008), (760, 27744), (768, 27455), (816, 25840), (867, 24320), (912, 23120), (960, 21964), (969, 21760), (1020, 20672), (1088, 19380), (1140, 18496), (1156, 18240), (1216, 17340), (1280, 16473), (1292, 16320), (1360, 15504), (1445, 14592), (1520, 13872), (1615, 13056), (1632, 12920), (1734, 12160), (1824, 11560), (1920, 10982), (1938, 10880), (2040, 10336), (2176, 9690), (2280, 9248), (2312, 9120), (2432, 8670), (2584, 8160), (2720, 7752), (2890, 7296), (3040, 6936), (3230, 6528), (3264, 6460), (3468, 6080), (3648, 5780), (3840, 5491), (3876, 5440), (4080, 5168), (4335, 4864), (4352, 4845), (4560, 4624)]