20645037

素因数分解:

$3^5\times 7^1\times {\mathrm{53}}^1\times {\mathrm{229}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 36167040

約数和(自身を除く): 15522003

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 81, 159, 189, 229, 243, 371, 477, 567, 687, 1113, 1431, 1603, 1701, 2061, 3339, 4293, 4809, 6183, 10017, 12137, 12879, 14427, 18549, 30051, 36411, 43281, 55647, 84959, 90153, 109233, 129843, 254877, 327699, 389529, 764631, 983097, 2293893, 2949291, 6881679, 20645037]

約数ペア:

[(1, 20645037), (3, 6881679), (7, 2949291), (9, 2293893), (21, 983097), (27, 764631), (53, 389529), (63, 327699), (81, 254877), (159, 129843), (189, 109233), (229, 90153), (243, 84959), (371, 55647), (477, 43281), (567, 36411), (687, 30051), (1113, 18549), (1431, 14427), (1603, 12879), (1701, 12137), (2061, 10017), (3339, 6183), (4293, 4809)]