19641215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{1973}}^1$

素因数の和:2170

約数の個数: 16

約数和(自身を含む): 25867296

約数和(自身を除く): 6226081

約数列:

[1, 5, 11, 55, 181, 905, 1973, 1991, 9865, 9955, 21703, 108515, 357113, 1785565, 3928243, 19641215]

約数ペア:

[(1, 19641215), (5, 3928243), (11, 1785565), (55, 357113), (181, 108515), (905, 21703), (1973, 9955), (1991, 9865)]