21121995

素因数分解:

$3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{8969}}^1$

素因数の和:9134

約数の個数: 16

約数和(自身を含む): 34014240

約数和(自身を除く): 12892245

約数列:

[1, 3, 5, 15, 157, 471, 785, 2355, 8969, 26907, 44845, 134535, 1408133, 4224399, 7040665, 21121995]

約数ペア:

[(1, 21121995), (3, 7040665), (5, 4224399), (15, 1408133), (157, 134535), (471, 44845), (785, 26907), (2355, 8969)]