20731641

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{233}}^1$

素因数の和:485

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 12814599

約数列:

[1, 3, 7, 19, 21, 57, 133, 223, 233, 399, 669, 699, 1561, 1631, 4237, 4427, 4683, 4893, 12711, 13281, 29659, 30989, 51959, 88977, 92967, 155877, 363713, 987221, 1091139, 2961663, 6910547, 20731641]

約数ペア:

[(1, 20731641), (3, 6910547), (7, 2961663), (19, 1091139), (21, 987221), (57, 363713), (133, 155877), (223, 92967), (233, 88977), (399, 51959), (669, 30989), (699, 29659), (1561, 13281), (1631, 12711), (4237, 4893), (4427, 4683)]