20878779

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:327

約数の個数: 32

約数和(自身を含む): 30818304

約数和(自身を除く): 9939525

約数列:

[1, 3, 23, 31, 43, 69, 93, 129, 227, 681, 713, 989, 1333, 2139, 2967, 3999, 5221, 7037, 9761, 15663, 21111, 29283, 30659, 91977, 161851, 224503, 302591, 485553, 673509, 907773, 6959593, 20878779]

約数ペア:

[(1, 20878779), (3, 6959593), (23, 907773), (31, 673509), (43, 485553), (69, 302591), (93, 224503), (129, 161851), (227, 91977), (681, 30659), (713, 29283), (989, 21111), (1333, 15663), (2139, 9761), (2967, 7037), (3999, 5221)]