21617960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5939}}^1$

素因数の和:5970

約数の個数: 64

約数和(自身を含む): 59875200

約数和(自身を除く): 38257240

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5939, 11878, 23756, 29695, 41573, 47512, 59390, 77207, 83146, 118780, 154414, 166292, 207865, 237560, 308828, 332584, 386035, 415730, 540449, 617656, 772070, 831460, 1080898, 1544140, 1662920, 2161796, 2702245, 3088280, 4323592, 5404490, 10808980, 21617960]

約数ペア:

[(1, 21617960), (2, 10808980), (4, 5404490), (5, 4323592), (7, 3088280), (8, 2702245), (10, 2161796), (13, 1662920), (14, 1544140), (20, 1080898), (26, 831460), (28, 772070), (35, 617656), (40, 540449), (52, 415730), (56, 386035), (65, 332584), (70, 308828), (91, 237560), (104, 207865), (130, 166292), (140, 154414), (182, 118780), (260, 83146), (280, 77207), (364, 59390), (455, 47512), (520, 41573), (728, 29695), (910, 23756), (1820, 11878), (3640, 5939)]