821115

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 1448928

約数和(自身を除く): 627813

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 257, 355, 639, 771, 1065, 1285, 2313, 3195, 3855, 11565, 18247, 54741, 91235, 164223, 273705, 821115]

約数ペア:

[(1, 821115), (3, 273705), (5, 164223), (9, 91235), (15, 54741), (45, 18247), (71, 11565), (213, 3855), (257, 3195), (355, 2313), (639, 1285), (771, 1065)]