81321919

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{773}}^1$

素因数の和:919

約数の個数: 24

約数和(自身を含む): 100589040

約数和(自身を除く): 19267121

約数列:

[1, 7, 19, 49, 113, 133, 773, 791, 931, 2147, 5411, 5537, 14687, 15029, 37877, 87349, 102809, 105203, 611443, 719663, 1659631, 4280101, 11617417, 81321919]

約数ペア:

[(1, 81321919), (7, 11617417), (19, 4280101), (49, 1659631), (113, 719663), (133, 611443), (773, 105203), (791, 102809), (931, 87349), (2147, 37877), (5411, 15029), (5537, 14687)]