9990580

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{431}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 22498560

約数和(自身を除く): 12507980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 244, 305, 380, 431, 610, 862, 1159, 1220, 1724, 2155, 2318, 4310, 4636, 5795, 8189, 8620, 11590, 16378, 23180, 26291, 32756, 40945, 52582, 81890, 105164, 131455, 163780, 262910, 499529, 525820, 999058, 1998116, 2497645, 4995290, 9990580]

約数ペア:

[(1, 9990580), (2, 4995290), (4, 2497645), (5, 1998116), (10, 999058), (19, 525820), (20, 499529), (38, 262910), (61, 163780), (76, 131455), (95, 105164), (122, 81890), (190, 52582), (244, 40945), (305, 32756), (380, 26291), (431, 23180), (610, 16378), (862, 11590), (1159, 8620), (1220, 8189), (1724, 5795), (2155, 4636), (2318, 4310)]