1638215199

素因数分解:

$3^4\times {\mathrm{691}}^1\times {\mathrm{29269}}^1$

素因数の和:29972

約数の個数: 20

約数和(自身を含む): 2450835640

約数和(自身を除く): 812620441

約数列:

[1, 3, 9, 27, 81, 691, 2073, 6219, 18657, 29269, 55971, 87807, 263421, 790263, 2370789, 20224879, 60674637, 182023911, 546071733, 1638215199]

約数ペア:

[(1, 1638215199), (3, 546071733), (9, 182023911), (27, 60674637), (81, 20224879), (691, 2370789), (2073, 790263), (6219, 263421), (18657, 87807), (29269, 55971)]