21577325

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1019}}^1$

素因数の和:1058

約数の個数: 36

約数和(自身を含む): 33643680

約数和(自身を除く): 12066355

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 121, 175, 275, 385, 605, 847, 1019, 1925, 3025, 4235, 5095, 7133, 11209, 21175, 25475, 35665, 56045, 78463, 123299, 178325, 280225, 392315, 616495, 863093, 1961575, 3082475, 4315465, 21577325]

約数ペア:

[(1, 21577325), (5, 4315465), (7, 3082475), (11, 1961575), (25, 863093), (35, 616495), (55, 392315), (77, 280225), (121, 178325), (175, 123299), (275, 78463), (385, 56045), (605, 35665), (847, 25475), (1019, 21175), (1925, 11209), (3025, 7133), (4235, 5095)]