21001012

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{659}}^1$

素因数の和:951

約数の個数: 24

約数和(自身を含む): 38142720

約数和(自身を除く): 17141708

約数列:

[1, 2, 4, 31, 62, 124, 257, 514, 659, 1028, 1318, 2636, 7967, 15934, 20429, 31868, 40858, 81716, 169363, 338726, 677452, 5250253, 10500506, 21001012]

約数ペア:

[(1, 21001012), (2, 10500506), (4, 5250253), (31, 677452), (62, 338726), (124, 169363), (257, 81716), (514, 40858), (659, 31868), (1028, 20429), (1318, 15934), (2636, 7967)]