21720478

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{28807}}^1$

素因数の和:28851

約数の個数: 16

約数和(自身を含む): 36298080

約数和(自身を除く): 14577602

約数列:

[1, 2, 13, 26, 29, 58, 377, 754, 28807, 57614, 374491, 748982, 835403, 1670806, 10860239, 21720478]

約数ペア:

[(1, 21720478), (2, 10860239), (13, 1670806), (26, 835403), (29, 748982), (58, 374491), (377, 57614), (754, 28807)]