21309551

素因数分解:

${\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{353}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 23397984

約数和(自身を除く): 2088433

約数列:

[1, 17, 53, 67, 353, 901, 1139, 3551, 6001, 18709, 23651, 60367, 318053, 402067, 1253503, 21309551]

約数ペア:

[(1, 21309551), (17, 1253503), (53, 402067), (67, 318053), (353, 60367), (901, 23651), (1139, 18709), (3551, 6001)]