20927079

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1$

素因数の和:321

約数の個数: 40

約数和(自身を含む): 33454080

約数和(自身を除く): 12527001

約数列:

[1, 3, 9, 23, 27, 47, 69, 81, 141, 207, 239, 423, 621, 717, 1081, 1269, 1863, 2151, 3243, 3807, 5497, 6453, 9729, 11233, 16491, 19359, 29187, 33699, 49473, 87561, 101097, 148419, 258359, 303291, 445257, 775077, 909873, 2325231, 6975693, 20927079]

約数ペア:

[(1, 20927079), (3, 6975693), (9, 2325231), (23, 909873), (27, 775077), (47, 445257), (69, 303291), (81, 258359), (141, 148419), (207, 101097), (239, 87561), (423, 49473), (621, 33699), (717, 29187), (1081, 19359), (1269, 16491), (1863, 11233), (2151, 9729), (3243, 6453), (3807, 5497)]