21405475

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^2$

素因数の和:224

約数の個数: 36

約数和(自身を含む): 33008304

約数和(自身を除く): 11602829

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 97, 175, 325, 455, 485, 679, 1261, 2275, 2425, 3395, 6305, 8827, 9409, 16975, 31525, 44135, 47045, 65863, 122317, 220675, 235225, 329315, 611585, 856219, 1646575, 3057925, 4281095, 21405475]

約数ペア:

[(1, 21405475), (5, 4281095), (7, 3057925), (13, 1646575), (25, 856219), (35, 611585), (65, 329315), (91, 235225), (97, 220675), (175, 122317), (325, 65863), (455, 47045), (485, 44135), (679, 31525), (1261, 16975), (2275, 9409), (2425, 8827), (3395, 6305)]