20990116

素因数分解:

$2^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{8423}}^1$

素因数の和:8523

約数の個数: 24

約数和(自身を含む): 42456960

約数和(自身を除く): 21466844

約数列:

[1, 2, 4, 7, 14, 28, 89, 178, 356, 623, 1246, 2492, 8423, 16846, 33692, 58961, 117922, 235844, 749647, 1499294, 2998588, 5247529, 10495058, 20990116]

約数ペア:

[(1, 20990116), (2, 10495058), (4, 5247529), (7, 2998588), (14, 1499294), (28, 749647), (89, 235844), (178, 117922), (356, 58961), (623, 33692), (1246, 16846), (2492, 8423)]