64650440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{499}}^1$

素因数の和:630

約数の個数: 64

約数和(自身を含む): 151200000

約数和(自身を除く): 86549560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 79, 82, 158, 164, 205, 316, 328, 395, 410, 499, 632, 790, 820, 998, 1580, 1640, 1996, 2495, 3160, 3239, 3992, 4990, 6478, 9980, 12956, 16195, 19960, 20459, 25912, 32390, 39421, 40918, 64780, 78842, 81836, 102295, 129560, 157684, 163672, 197105, 204590, 315368, 394210, 409180, 788420, 818360, 1576840, 1616261, 3232522, 6465044, 8081305, 12930088, 16162610, 32325220, 64650440]

約数ペア:

[(1, 64650440), (2, 32325220), (4, 16162610), (5, 12930088), (8, 8081305), (10, 6465044), (20, 3232522), (40, 1616261), (41, 1576840), (79, 818360), (82, 788420), (158, 409180), (164, 394210), (205, 315368), (316, 204590), (328, 197105), (395, 163672), (410, 157684), (499, 129560), (632, 102295), (790, 81836), (820, 78842), (998, 64780), (1580, 40918), (1640, 39421), (1996, 32390), (2495, 25912), (3160, 20459), (3239, 19960), (3992, 16195), (4990, 12956), (6478, 9980)]