20121280

素因数分解:

$2^6\times 5^1\times {\mathrm{227}}^1\times {\mathrm{277}}^1$

素因数の和:521

約数の個数: 56

約数和(自身を含む): 48298608

約数和(自身を除く): 28177328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 227, 277, 320, 454, 554, 908, 1108, 1135, 1385, 1816, 2216, 2270, 2770, 3632, 4432, 4540, 5540, 7264, 8864, 9080, 11080, 14528, 17728, 18160, 22160, 36320, 44320, 62879, 72640, 88640, 125758, 251516, 314395, 503032, 628790, 1006064, 1257580, 2012128, 2515160, 4024256, 5030320, 10060640, 20121280]

約数ペア:

[(1, 20121280), (2, 10060640), (4, 5030320), (5, 4024256), (8, 2515160), (10, 2012128), (16, 1257580), (20, 1006064), (32, 628790), (40, 503032), (64, 314395), (80, 251516), (160, 125758), (227, 88640), (277, 72640), (320, 62879), (454, 44320), (554, 36320), (908, 22160), (1108, 18160), (1135, 17728), (1385, 14528), (1816, 11080), (2216, 9080), (2270, 8864), (2770, 7264), (3632, 5540), (4432, 4540)]