20895155

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 28131840

約数和(自身を除く): 7236685

約数列:

[1, 5, 19, 23, 73, 95, 115, 131, 365, 437, 655, 1387, 1679, 2185, 2489, 3013, 6935, 8395, 9563, 12445, 15065, 31901, 47815, 57247, 159505, 181697, 219949, 286235, 908485, 1099745, 4179031, 20895155]

約数ペア:

[(1, 20895155), (5, 4179031), (19, 1099745), (23, 908485), (73, 286235), (95, 219949), (115, 181697), (131, 159505), (365, 57247), (437, 47815), (655, 31901), (1387, 15065), (1679, 12445), (2185, 9563), (2489, 8395), (3013, 6935)]