20516920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{769}}^1$

素因数の和:832

約数の個数: 64

約数和(自身を含む): 49896000

約数和(自身を除く): 29379080

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 29, 40, 46, 58, 92, 115, 116, 145, 184, 230, 232, 290, 460, 580, 667, 769, 920, 1160, 1334, 1538, 2668, 3076, 3335, 3845, 5336, 6152, 6670, 7690, 13340, 15380, 17687, 22301, 26680, 30760, 35374, 44602, 70748, 88435, 89204, 111505, 141496, 176870, 178408, 223010, 353740, 446020, 512923, 707480, 892040, 1025846, 2051692, 2564615, 4103384, 5129230, 10258460, 20516920]

約数ペア:

[(1, 20516920), (2, 10258460), (4, 5129230), (5, 4103384), (8, 2564615), (10, 2051692), (20, 1025846), (23, 892040), (29, 707480), (40, 512923), (46, 446020), (58, 353740), (92, 223010), (115, 178408), (116, 176870), (145, 141496), (184, 111505), (230, 89204), (232, 88435), (290, 70748), (460, 44602), (580, 35374), (667, 30760), (769, 26680), (920, 22301), (1160, 17687), (1334, 15380), (1538, 13340), (2668, 7690), (3076, 6670), (3335, 6152), (3845, 5336)]