21887880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{367}}^1$

素因数の和:459

約数の個数: 128

約数和(自身を含む): 76308480

約数和(自身を除く): 54420600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 71, 84, 105, 120, 140, 142, 168, 210, 213, 280, 284, 355, 367, 420, 426, 497, 568, 710, 734, 840, 852, 994, 1065, 1101, 1420, 1468, 1491, 1704, 1835, 1988, 2130, 2202, 2485, 2569, 2840, 2936, 2982, 3670, 3976, 4260, 4404, 4970, 5138, 5505, 5964, 7340, 7455, 7707, 8520, 8808, 9940, 10276, 11010, 11928, 12845, 14680, 14910, 15414, 19880, 20552, 22020, 25690, 26057, 29820, 30828, 38535, 44040, 51380, 52114, 59640, 61656, 77070, 78171, 102760, 104228, 130285, 154140, 156342, 182399, 208456, 260570, 308280, 312684, 364798, 390855, 521140, 547197, 625368, 729596, 781710, 911995, 1042280, 1094394, 1459192, 1563420, 1823990, 2188788, 2735985, 3126840, 3647980, 4377576, 5471970, 7295960, 10943940, 21887880]

約数ペア:

[(1, 21887880), (2, 10943940), (3, 7295960), (4, 5471970), (5, 4377576), (6, 3647980), (7, 3126840), (8, 2735985), (10, 2188788), (12, 1823990), (14, 1563420), (15, 1459192), (20, 1094394), (21, 1042280), (24, 911995), (28, 781710), (30, 729596), (35, 625368), (40, 547197), (42, 521140), (56, 390855), (60, 364798), (70, 312684), (71, 308280), (84, 260570), (105, 208456), (120, 182399), (140, 156342), (142, 154140), (168, 130285), (210, 104228), (213, 102760), (280, 78171), (284, 77070), (355, 61656), (367, 59640), (420, 52114), (426, 51380), (497, 44040), (568, 38535), (710, 30828), (734, 29820), (840, 26057), (852, 25690), (994, 22020), (1065, 20552), (1101, 19880), (1420, 15414), (1468, 14910), (1491, 14680), (1704, 12845), (1835, 11928), (1988, 11010), (2130, 10276), (2202, 9940), (2485, 8808), (2569, 8520), (2840, 7707), (2936, 7455), (2982, 7340), (3670, 5964), (3976, 5505), (4260, 5138), (4404, 4970)]