28163980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{727}}^1$

素因数の和:898

約数の個数: 48

約数和(自身を含む): 64209600

約数和(自身を除く): 36045620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 149, 260, 298, 596, 727, 745, 1454, 1490, 1937, 2908, 2980, 3635, 3874, 7270, 7748, 9451, 9685, 14540, 18902, 19370, 37804, 38740, 47255, 94510, 108323, 189020, 216646, 433292, 541615, 1083230, 1408199, 2166460, 2816398, 5632796, 7040995, 14081990, 28163980]

約数ペア:

[(1, 28163980), (2, 14081990), (4, 7040995), (5, 5632796), (10, 2816398), (13, 2166460), (20, 1408199), (26, 1083230), (52, 541615), (65, 433292), (130, 216646), (149, 189020), (260, 108323), (298, 94510), (596, 47255), (727, 38740), (745, 37804), (1454, 19370), (1490, 18902), (1937, 14540), (2908, 9685), (2980, 9451), (3635, 7748), (3874, 7270)]