21972028

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{32503}}^1$

素因数の和:32533

約数の個数: 18

約数和(自身を含む): 41637624

約数和(自身を除く): 19665596

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 32503, 65006, 130012, 422539, 845078, 1690156, 5493007, 10986014, 21972028]

約数ペア:

[(1, 21972028), (2, 10986014), (4, 5493007), (13, 1690156), (26, 845078), (52, 422539), (169, 130012), (338, 65006), (676, 32503)]