20513816

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{457}}^1$

素因数の和:675

約数の個数: 32

約数和(自身を含む): 40010880

約数和(自身を除く): 19497064

約数列:

[1, 2, 4, 8, 31, 62, 124, 181, 248, 362, 457, 724, 914, 1448, 1828, 3656, 5611, 11222, 14167, 22444, 28334, 44888, 56668, 82717, 113336, 165434, 330868, 661736, 2564227, 5128454, 10256908, 20513816]

約数ペア:

[(1, 20513816), (2, 10256908), (4, 5128454), (8, 2564227), (31, 661736), (62, 330868), (124, 165434), (181, 113336), (248, 82717), (362, 56668), (457, 44888), (724, 28334), (914, 22444), (1448, 14167), (1828, 11222), (3656, 5611)]