21726873

素因数分解:

$3^5\times 7^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 38054016

約数和(自身を除く): 16327143

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 81, 159, 189, 241, 243, 371, 477, 567, 723, 1113, 1431, 1687, 1701, 2169, 3339, 4293, 5061, 6507, 10017, 12773, 12879, 15183, 19521, 30051, 38319, 45549, 58563, 89411, 90153, 114957, 136647, 268233, 344871, 409941, 804699, 1034613, 2414097, 3103839, 7242291, 21726873]

約数ペア:

[(1, 21726873), (3, 7242291), (7, 3103839), (9, 2414097), (21, 1034613), (27, 804699), (53, 409941), (63, 344871), (81, 268233), (159, 136647), (189, 114957), (241, 90153), (243, 89411), (371, 58563), (477, 45549), (567, 38319), (723, 30051), (1113, 19521), (1431, 15183), (1687, 12879), (1701, 12773), (2169, 10017), (3339, 6507), (4293, 5061)]