21721965

素因数分解:

$3^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{9719}}^1$

素因数の和:9876

約数の個数: 16

約数和(自身を含む): 34992000

約数和(自身を除く): 13270035

約数列:

[1, 3, 5, 15, 149, 447, 745, 2235, 9719, 29157, 48595, 145785, 1448131, 4344393, 7240655, 21721965]

約数ペア:

[(1, 21721965), (3, 7240655), (5, 4344393), (15, 1448131), (149, 145785), (447, 48595), (745, 29157), (2235, 9719)]