21238689

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 30818304

約数和(自身を除く): 9579615

約数列:

[1, 3, 31, 43, 47, 93, 113, 129, 141, 339, 1333, 1457, 2021, 3503, 3999, 4371, 4859, 5311, 6063, 10509, 14577, 15933, 62651, 150629, 164641, 187953, 228373, 451887, 493923, 685119, 7079563, 21238689]

約数ペア:

[(1, 21238689), (3, 7079563), (31, 685119), (43, 493923), (47, 451887), (93, 228373), (113, 187953), (129, 164641), (141, 150629), (339, 62651), (1333, 15933), (1457, 14577), (2021, 10509), (3503, 6063), (3999, 5311), (4371, 4859)]