19915505

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{397}}^1$

素因数の和:608

約数の個数: 16

約数和(自身を含む): 24453120

約数和(自身を除く): 4537615

約数列:

[1, 5, 79, 127, 395, 397, 635, 1985, 10033, 31363, 50165, 50419, 156815, 252095, 3983101, 19915505]

約数ペア:

[(1, 19915505), (5, 3983101), (79, 252095), (127, 156815), (395, 50419), (397, 50165), (635, 31363), (1985, 10033)]