19781355

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{1187}}^1$

素因数の和:1307

約数の個数: 32

約数和(自身を含む): 34898688

約数和(自身を除く): 15117333

約数列:

[1, 3, 5, 11, 15, 33, 55, 101, 165, 303, 505, 1111, 1187, 1515, 3333, 3561, 5555, 5935, 13057, 16665, 17805, 39171, 65285, 119887, 195855, 359661, 599435, 1318757, 1798305, 3956271, 6593785, 19781355]

約数ペア:

[(1, 19781355), (3, 6593785), (5, 3956271), (11, 1798305), (15, 1318757), (33, 599435), (55, 359661), (101, 195855), (165, 119887), (303, 65285), (505, 39171), (1111, 17805), (1187, 16665), (1515, 13057), (3333, 5935), (3561, 5555)]