79380920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{499}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 185220000

約数和(自身を除く): 105839080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 164, 194, 205, 328, 388, 410, 485, 499, 776, 820, 970, 998, 1640, 1940, 1996, 2495, 3880, 3977, 3992, 4990, 7954, 9980, 15908, 19885, 19960, 20459, 31816, 39770, 40918, 48403, 79540, 81836, 96806, 102295, 159080, 163672, 193612, 204590, 242015, 387224, 409180, 484030, 818360, 968060, 1936120, 1984523, 3969046, 7938092, 9922615, 15876184, 19845230, 39690460, 79380920]

約数ペア:

[(1, 79380920), (2, 39690460), (4, 19845230), (5, 15876184), (8, 9922615), (10, 7938092), (20, 3969046), (40, 1984523), (41, 1936120), (82, 968060), (97, 818360), (164, 484030), (194, 409180), (205, 387224), (328, 242015), (388, 204590), (410, 193612), (485, 163672), (499, 159080), (776, 102295), (820, 96806), (970, 81836), (998, 79540), (1640, 48403), (1940, 40918), (1996, 39770), (2495, 31816), (3880, 20459), (3977, 19960), (3992, 19885), (4990, 15908), (7954, 9980)]