254310220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1\times {\mathrm{1399}}^1$

素因数の和:1618

約数の個数: 48

約数和(自身を含む): 546840000

約数和(自身を除く): 292529780

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 149, 244, 298, 305, 596, 610, 745, 1220, 1399, 1490, 2798, 2980, 5596, 6995, 9089, 13990, 18178, 27980, 36356, 45445, 85339, 90890, 170678, 181780, 208451, 341356, 416902, 426695, 833804, 853390, 1042255, 1706780, 2084510, 4169020, 12715511, 25431022, 50862044, 63577555, 127155110, 254310220]

約数ペア:

[(1, 254310220), (2, 127155110), (4, 63577555), (5, 50862044), (10, 25431022), (20, 12715511), (61, 4169020), (122, 2084510), (149, 1706780), (244, 1042255), (298, 853390), (305, 833804), (596, 426695), (610, 416902), (745, 341356), (1220, 208451), (1399, 181780), (1490, 170678), (2798, 90890), (2980, 85339), (5596, 45445), (6995, 36356), (9089, 27980), (13990, 18178)]