18939915

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{13577}}^1$

素因数の和:13619

約数の個数: 24

約数和(自身を含む): 33890688

約数和(自身を除く): 14950773

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 13577, 40731, 67885, 122193, 203655, 420887, 610965, 1262661, 2104435, 3787983, 6313305, 18939915]

約数ペア:

[(1, 18939915), (3, 6313305), (5, 3787983), (9, 2104435), (15, 1262661), (31, 610965), (45, 420887), (93, 203655), (155, 122193), (279, 67885), (465, 40731), (1395, 13577)]