20939805

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{1289}}^1$

素因数の和:1338

約数の個数: 36

約数和(自身を含む): 38336220

約数和(自身を除く): 17396415

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 361, 855, 1083, 1289, 1805, 3249, 3867, 5415, 6445, 11601, 16245, 19335, 24491, 58005, 73473, 122455, 220419, 367365, 465329, 1102095, 1395987, 2326645, 4187961, 6979935, 20939805]

約数ペア:

[(1, 20939805), (3, 6979935), (5, 4187961), (9, 2326645), (15, 1395987), (19, 1102095), (45, 465329), (57, 367365), (95, 220419), (171, 122455), (285, 73473), (361, 58005), (855, 24491), (1083, 19335), (1289, 16245), (1805, 11601), (3249, 6445), (3867, 5415)]