17901981

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{439}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 27181440

約数和(自身を除く): 9279459

約数列:

[1, 3, 9, 23, 69, 197, 207, 439, 591, 1317, 1773, 3951, 4531, 10097, 13593, 30291, 40779, 86483, 90873, 259449, 778347, 1989109, 5967327, 17901981]

約数ペア:

[(1, 17901981), (3, 5967327), (9, 1989109), (23, 778347), (69, 259449), (197, 90873), (207, 86483), (439, 40779), (591, 30291), (1317, 13593), (1773, 10097), (3951, 4531)]