21990657

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{503}}^1$

素因数の和:597

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 11878143

約数列:

[1, 3, 13, 19, 39, 57, 59, 177, 247, 503, 741, 767, 1121, 1509, 2301, 3363, 6539, 9557, 14573, 19617, 28671, 29677, 43719, 89031, 124241, 372723, 385801, 563863, 1157403, 1691589, 7330219, 21990657]

約数ペア:

[(1, 21990657), (3, 7330219), (13, 1691589), (19, 1157403), (39, 563863), (57, 385801), (59, 372723), (177, 124241), (247, 89031), (503, 43719), (741, 29677), (767, 28671), (1121, 19617), (1509, 14573), (2301, 9557), (3363, 6539)]