21036421

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{193}}^1\times {\mathrm{677}}^1$

素因数の和:900

約数の個数: 16

約数和(自身を含む): 25254144

約数和(自身を除く): 4217723

約数列:

[1, 7, 23, 161, 193, 677, 1351, 4439, 4739, 15571, 31073, 108997, 130661, 914627, 3005203, 21036421]

約数ペア:

[(1, 21036421), (7, 3005203), (23, 914627), (161, 130661), (193, 108997), (677, 31073), (1351, 15571), (4439, 4739)]