20178855

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{7867}}^1$

素因数の和:7900

約数の個数: 32

約数和(自身を含む): 37766400

約数和(自身を除く): 17587545

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 7867, 23601, 39335, 70803, 118005, 149473, 212409, 354015, 448419, 747365, 1062045, 1345257, 2242095, 4035771, 6726285, 20178855]

約数ペア:

[(1, 20178855), (3, 6726285), (5, 4035771), (9, 2242095), (15, 1345257), (19, 1062045), (27, 747365), (45, 448419), (57, 354015), (95, 212409), (135, 149473), (171, 118005), (285, 70803), (513, 39335), (855, 23601), (2565, 7867)]