20117421

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{227}}^1\times {\mathrm{229}}^1$

素因数の和:505

約数の個数: 24

約数和(自身を含む): 29995680

約数和(自身を除く): 9878259

約数列:

[1, 3, 9, 43, 129, 227, 229, 387, 681, 687, 2043, 2061, 9761, 9847, 29283, 29541, 51983, 87849, 88623, 155949, 467847, 2235269, 6705807, 20117421]

約数ペア:

[(1, 20117421), (3, 6705807), (9, 2235269), (43, 467847), (129, 155949), (227, 88623), (229, 87849), (387, 51983), (681, 29541), (687, 29283), (2043, 9847), (2061, 9761)]