21715925

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{389}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 34819200

約数和(自身を除く): 13103275

約数列:

[1, 5, 7, 11, 25, 29, 35, 55, 77, 145, 175, 203, 275, 319, 385, 389, 725, 1015, 1595, 1925, 1945, 2233, 2723, 4279, 5075, 7975, 9725, 11165, 11281, 13615, 21395, 29953, 55825, 56405, 68075, 78967, 106975, 124091, 149765, 282025, 394835, 620455, 748825, 868637, 1974175, 3102275, 4343185, 21715925]

約数ペア:

[(1, 21715925), (5, 4343185), (7, 3102275), (11, 1974175), (25, 868637), (29, 748825), (35, 620455), (55, 394835), (77, 282025), (145, 149765), (175, 124091), (203, 106975), (275, 78967), (319, 68075), (385, 56405), (389, 55825), (725, 29953), (1015, 21395), (1595, 13615), (1925, 11281), (1945, 11165), (2233, 9725), (2723, 7975), (4279, 5075)]