861556460

素因数分解:

$2^2\times 5^1\times {\mathrm{557}}^1\times {\mathrm{77339}}^1$

素因数の和:77905

約数の個数: 24

約数和(自身を含む): 1812540240

約数和(自身を除く): 950983780

約数列:

[1, 2, 4, 5, 10, 20, 557, 1114, 2228, 2785, 5570, 11140, 77339, 154678, 309356, 386695, 773390, 1546780, 43077823, 86155646, 172311292, 215389115, 430778230, 861556460]

約数ペア:

[(1, 861556460), (2, 430778230), (4, 215389115), (5, 172311292), (10, 86155646), (20, 43077823), (557, 1546780), (1114, 773390), (2228, 386695), (2785, 309356), (5570, 154678), (11140, 77339)]