21281360

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9173}}^1$

素因数の和:9215

約数の個数: 40

約数和(自身を含む): 51190920

約数和(自身を除く): 29909560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 9173, 18346, 36692, 45865, 73384, 91730, 146768, 183460, 266017, 366920, 532034, 733840, 1064068, 1330085, 2128136, 2660170, 4256272, 5320340, 10640680, 21281360]

約数ペア:

[(1, 21281360), (2, 10640680), (4, 5320340), (5, 4256272), (8, 2660170), (10, 2128136), (16, 1330085), (20, 1064068), (29, 733840), (40, 532034), (58, 366920), (80, 266017), (116, 183460), (145, 146768), (232, 91730), (290, 73384), (464, 45865), (580, 36692), (1160, 18346), (2320, 9173)]