21188545

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:417

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9915455

約数列:

[1, 5, 7, 17, 35, 85, 119, 149, 239, 595, 745, 1043, 1195, 1673, 2533, 4063, 5215, 8365, 12665, 17731, 20315, 28441, 35611, 88655, 142205, 178055, 249277, 605387, 1246385, 3026935, 4237709, 21188545]

約数ペア:

[(1, 21188545), (5, 4237709), (7, 3026935), (17, 1246385), (35, 605387), (85, 249277), (119, 178055), (149, 142205), (239, 88655), (595, 35611), (745, 28441), (1043, 20315), (1195, 17731), (1673, 12665), (2533, 8365), (4063, 5215)]