21931975

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{179}}^1$

素因数の和:244

約数の個数: 36

約数和(自身を含む): 30634200

約数和(自身を除く): 8702225

約数列:

[1, 5, 13, 25, 29, 65, 145, 169, 179, 325, 377, 725, 845, 895, 1885, 2327, 4225, 4475, 4901, 5191, 9425, 11635, 24505, 25955, 30251, 58175, 67483, 122525, 129775, 151255, 337415, 756275, 877279, 1687075, 4386395, 21931975]

約数ペア:

[(1, 21931975), (5, 4386395), (13, 1687075), (25, 877279), (29, 756275), (65, 337415), (145, 151255), (169, 129775), (179, 122525), (325, 67483), (377, 58175), (725, 30251), (845, 25955), (895, 24505), (1885, 11635), (2327, 9425), (4225, 5191), (4475, 4901)]