8656780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{109}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 21122640

約数和(自身を除く): 12465860

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 109, 110, 190, 209, 218, 220, 361, 380, 418, 436, 545, 722, 836, 1045, 1090, 1199, 1444, 1805, 2071, 2090, 2180, 2398, 3610, 3971, 4142, 4180, 4796, 5995, 7220, 7942, 8284, 10355, 11990, 15884, 19855, 20710, 22781, 23980, 39349, 39710, 41420, 45562, 78698, 79420, 91124, 113905, 157396, 196745, 227810, 393490, 432839, 455620, 786980, 865678, 1731356, 2164195, 4328390, 8656780]

約数ペア:

[(1, 8656780), (2, 4328390), (4, 2164195), (5, 1731356), (10, 865678), (11, 786980), (19, 455620), (20, 432839), (22, 393490), (38, 227810), (44, 196745), (55, 157396), (76, 113905), (95, 91124), (109, 79420), (110, 78698), (190, 45562), (209, 41420), (218, 39710), (220, 39349), (361, 23980), (380, 22781), (418, 20710), (436, 19855), (545, 15884), (722, 11990), (836, 10355), (1045, 8284), (1090, 7942), (1199, 7220), (1444, 5995), (1805, 4796), (2071, 4180), (2090, 4142), (2180, 3971), (2398, 3610)]