20581290

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{25409}}^1$

素因数の和:25428

約数の個数: 40

約数和(自身を含む): 55342980

約数和(自身を除く): 34761690

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810, 25409, 50818, 76227, 127045, 152454, 228681, 254090, 381135, 457362, 686043, 762270, 1143405, 1372086, 2058129, 2286810, 3430215, 4116258, 6860430, 10290645, 20581290]

約数ペア:

[(1, 20581290), (2, 10290645), (3, 6860430), (5, 4116258), (6, 3430215), (9, 2286810), (10, 2058129), (15, 1372086), (18, 1143405), (27, 762270), (30, 686043), (45, 457362), (54, 381135), (81, 254090), (90, 228681), (135, 152454), (162, 127045), (270, 76227), (405, 50818), (810, 25409)]