21141725

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{241}}^1$

素因数の和:302

約数の個数: 36

約数和(自身を含む): 29932980

約数和(自身を除く): 8791255

約数列:

[1, 5, 11, 25, 29, 55, 121, 145, 241, 275, 319, 605, 725, 1205, 1595, 2651, 3025, 3509, 6025, 6989, 7975, 13255, 17545, 29161, 34945, 66275, 76879, 87725, 145805, 174725, 384395, 729025, 845669, 1921975, 4228345, 21141725]

約数ペア:

[(1, 21141725), (5, 4228345), (11, 1921975), (25, 845669), (29, 729025), (55, 384395), (121, 174725), (145, 145805), (241, 87725), (275, 76879), (319, 66275), (605, 34945), (725, 29161), (1205, 17545), (1595, 13255), (2651, 7975), (3025, 6989), (3509, 6025)]