20503557

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{241}}^1$

素因数の和:410

約数の個数: 32

約数和(自身を含む): 32060160

約数和(自身を除く): 11556603

約数列:

[1, 3, 9, 23, 27, 69, 137, 207, 241, 411, 621, 723, 1233, 2169, 3151, 3699, 5543, 6507, 9453, 16629, 28359, 33017, 49887, 85077, 99051, 149661, 297153, 759391, 891459, 2278173, 6834519, 20503557]

約数ペア:

[(1, 20503557), (3, 6834519), (9, 2278173), (23, 891459), (27, 759391), (69, 297153), (137, 149661), (207, 99051), (241, 85077), (411, 49887), (621, 33017), (723, 28359), (1233, 16629), (2169, 9453), (3151, 6507), (3699, 5543)]