18881980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72623}}^1$

素因数の和:72645

約数の個数: 24

約数和(自身を含む): 42702912

約数和(自身を除く): 23820932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72623, 145246, 290492, 363115, 726230, 944099, 1452460, 1888198, 3776396, 4720495, 9440990, 18881980]

約数ペア:

[(1, 18881980), (2, 9440990), (4, 4720495), (5, 3776396), (10, 1888198), (13, 1452460), (20, 944099), (26, 726230), (52, 363115), (65, 290492), (130, 145246), (260, 72623)]