4001991

素因数分解:

$3^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1279}}^1$

素因数の和:1438

約数の個数: 16

約数和(自身を含む): 6144000

約数和(自身を除く): 2142009

約数列:

[1, 3, 7, 21, 149, 447, 1043, 1279, 3129, 3837, 8953, 26859, 190571, 571713, 1333997, 4001991]

約数ペア:

[(1, 4001991), (3, 1333997), (7, 571713), (21, 190571), (149, 26859), (447, 8953), (1043, 3837), (1279, 3129)]