21731260

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7817}}^1$

素因数の和:7965

約数の個数: 24

約数和(自身を含む): 45969840

約数和(自身を除く): 24238580

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7817, 15634, 31268, 39085, 78170, 156340, 1086563, 2173126, 4346252, 5432815, 10865630, 21731260]

約数ペア:

[(1, 21731260), (2, 10865630), (4, 5432815), (5, 4346252), (10, 2173126), (20, 1086563), (139, 156340), (278, 78170), (556, 39085), (695, 31268), (1390, 15634), (2780, 7817)]