21137529

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{409}}^1$

素因数の和:549

約数の個数: 32

約数和(自身を含む): 34007040

約数和(自身を除く): 12869511

約数列:

[1, 3, 7, 21, 23, 69, 107, 161, 321, 409, 483, 749, 1227, 2247, 2461, 2863, 7383, 8589, 9407, 17227, 28221, 43763, 51681, 65849, 131289, 197547, 306341, 919023, 1006549, 3019647, 7045843, 21137529]

約数ペア:

[(1, 21137529), (3, 7045843), (7, 3019647), (21, 1006549), (23, 919023), (69, 306341), (107, 197547), (161, 131289), (321, 65849), (409, 51681), (483, 43763), (749, 28221), (1227, 17227), (2247, 9407), (2461, 8589), (2863, 7383)]