290996840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{239}}^1\times {\mathrm{499}}^1$

素因数の和:810

約数の個数: 64

約数和(自身を含む): 669600000

約数和(自身を除く): 378603160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 239, 244, 305, 478, 488, 499, 610, 956, 998, 1195, 1220, 1912, 1996, 2390, 2440, 2495, 3992, 4780, 4990, 9560, 9980, 14579, 19960, 29158, 30439, 58316, 60878, 72895, 116632, 119261, 121756, 145790, 152195, 238522, 243512, 291580, 304390, 477044, 583160, 596305, 608780, 954088, 1192610, 1217560, 2385220, 4770440, 7274921, 14549842, 29099684, 36374605, 58199368, 72749210, 145498420, 290996840]

約数ペア:

[(1, 290996840), (2, 145498420), (4, 72749210), (5, 58199368), (8, 36374605), (10, 29099684), (20, 14549842), (40, 7274921), (61, 4770440), (122, 2385220), (239, 1217560), (244, 1192610), (305, 954088), (478, 608780), (488, 596305), (499, 583160), (610, 477044), (956, 304390), (998, 291580), (1195, 243512), (1220, 238522), (1912, 152195), (1996, 145790), (2390, 121756), (2440, 119261), (2495, 116632), (3992, 72895), (4780, 60878), (4990, 58316), (9560, 30439), (9980, 29158), (14579, 19960)]