21499647

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17783}}^1$

素因数の和:17830

約数の個数: 16

約数和(自身を含む): 31868928

約数和(自身を除く): 10369281

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17783, 53349, 231179, 551273, 693537, 1653819, 7166549, 21499647]

約数ペア:

[(1, 21499647), (3, 7166549), (13, 1653819), (31, 693537), (39, 551273), (93, 231179), (403, 53349), (1209, 17783)]