20028680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{233}}^1\times {\mathrm{307}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 51891840

約数和(自身を除く): 31863160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 233, 280, 307, 466, 614, 932, 1165, 1228, 1535, 1631, 1864, 2149, 2330, 2456, 3070, 3262, 4298, 4660, 6140, 6524, 8155, 8596, 9320, 10745, 12280, 13048, 16310, 17192, 21490, 32620, 42980, 65240, 71531, 85960, 143062, 286124, 357655, 500717, 572248, 715310, 1001434, 1430620, 2002868, 2503585, 2861240, 4005736, 5007170, 10014340, 20028680]

約数ペア:

[(1, 20028680), (2, 10014340), (4, 5007170), (5, 4005736), (7, 2861240), (8, 2503585), (10, 2002868), (14, 1430620), (20, 1001434), (28, 715310), (35, 572248), (40, 500717), (56, 357655), (70, 286124), (140, 143062), (233, 85960), (280, 71531), (307, 65240), (466, 42980), (614, 32620), (932, 21490), (1165, 17192), (1228, 16310), (1535, 13048), (1631, 12280), (1864, 10745), (2149, 9320), (2330, 8596), (2456, 8155), (3070, 6524), (3262, 6140), (4298, 4660)]