21820493

素因数分解:

${\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:428

約数の個数: 16

約数和(自身を含む): 23778240

約数和(自身を除く): 1957747

約数列:

[1, 19, 61, 67, 281, 1159, 1273, 4087, 5339, 17141, 18827, 77653, 325679, 357713, 1148447, 21820493]

約数ペア:

[(1, 21820493), (19, 1148447), (61, 357713), (67, 325679), (281, 77653), (1159, 18827), (1273, 17141), (4087, 5339)]