18899973

素因数分解:

$3^4\times {\mathrm{353}}^1\times {\mathrm{661}}^1$

素因数の和:1026

約数の個数: 20

約数和(自身を含む): 28356108

約数和(自身を除く): 9456135

約数列:

[1, 3, 9, 27, 81, 353, 661, 1059, 1983, 3177, 5949, 9531, 17847, 28593, 53541, 233333, 699999, 2099997, 6299991, 18899973]

約数ペア:

[(1, 18899973), (3, 6299991), (9, 2099997), (27, 699999), (81, 233333), (353, 53541), (661, 28593), (1059, 17847), (1983, 9531), (3177, 5949)]