21053601

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4261}}^1$

素因数の和:4334

約数の個数: 20

約数和(自身を含む): 31973524

約数和(自身を除く): 10919923

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4261, 4941, 12783, 38349, 115047, 259921, 345141, 779763, 2339289, 7017867, 21053601]

約数ペア:

[(1, 21053601), (3, 7017867), (9, 2339289), (27, 779763), (61, 345141), (81, 259921), (183, 115047), (549, 38349), (1647, 12783), (4261, 4941)]