21245905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{773}}^1$

素因数の和:1040

約数の個数: 16

約数和(自身を含む): 26749440

約数和(自身を除く): 5503535

約数列:

[1, 5, 23, 115, 239, 773, 1195, 3865, 5497, 17779, 27485, 88895, 184747, 923735, 4249181, 21245905]

約数ペア:

[(1, 21245905), (5, 4249181), (23, 923735), (115, 184747), (239, 88895), (773, 27485), (1195, 17779), (3865, 5497)]