399984981

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{661}}^1\times {\mathrm{1667}}^1$

素因数の和:2353

約数の個数: 24

約数和(自身を含む): 587442912

約数和(自身を除く): 187457931

約数列:

[1, 3, 11, 33, 121, 363, 661, 1667, 1983, 5001, 7271, 18337, 21813, 55011, 79981, 201707, 239943, 605121, 1101887, 3305661, 12120757, 36362271, 133328327, 399984981]

約数ペア:

[(1, 399984981), (3, 133328327), (11, 36362271), (33, 12120757), (121, 3305661), (363, 1101887), (661, 605121), (1667, 239943), (1983, 201707), (5001, 79981), (7271, 55011), (18337, 21813)]