20409027500

素因数分解:

$2^2\times 5^4\times {\mathrm{421}}^1\times {\mathrm{19391}}^1$

素因数の和:19836

約数の個数: 60

約数和(自身を含む): 44738779008

約数和(自身を除く): 24329751508

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 421, 500, 625, 842, 1250, 1684, 2105, 2500, 4210, 8420, 10525, 19391, 21050, 38782, 42100, 52625, 77564, 96955, 105250, 193910, 210500, 263125, 387820, 484775, 526250, 969550, 1052500, 1939100, 2423875, 4847750, 8163611, 9695500, 12119375, 16327222, 24238750, 32654444, 40818055, 48477500, 81636110, 163272220, 204090275, 408180550, 816361100, 1020451375, 2040902750, 4081805500, 5102256875, 10204513750, 20409027500]

約数ペア:

[(1, 20409027500), (2, 10204513750), (4, 5102256875), (5, 4081805500), (10, 2040902750), (20, 1020451375), (25, 816361100), (50, 408180550), (100, 204090275), (125, 163272220), (250, 81636110), (421, 48477500), (500, 40818055), (625, 32654444), (842, 24238750), (1250, 16327222), (1684, 12119375), (2105, 9695500), (2500, 8163611), (4210, 4847750), (8420, 2423875), (10525, 1939100), (19391, 1052500), (21050, 969550), (38782, 526250), (42100, 484775), (52625, 387820), (77564, 263125), (96955, 210500), (105250, 193910)]