21285275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 31739040

約数和(自身を除く): 10453765

約数列:

[1, 5, 11, 17, 25, 29, 55, 85, 145, 157, 187, 275, 319, 425, 493, 725, 785, 935, 1595, 1727, 2465, 2669, 3925, 4553, 4675, 5423, 7975, 8635, 12325, 13345, 22765, 27115, 29359, 43175, 50083, 66725, 77401, 113825, 135575, 146795, 250415, 387005, 733975, 851411, 1252075, 1935025, 4257055, 21285275]

約数ペア:

[(1, 21285275), (5, 4257055), (11, 1935025), (17, 1252075), (25, 851411), (29, 733975), (55, 387005), (85, 250415), (145, 146795), (157, 135575), (187, 113825), (275, 77401), (319, 66725), (425, 50083), (493, 43175), (725, 29359), (785, 27115), (935, 22765), (1595, 13345), (1727, 12325), (2465, 8635), (2669, 7975), (3925, 5423), (4553, 4675)]