21046025

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2$

素因数の和:99

約数の個数: 72

約数和(自身を含む): 36289344

約数和(自身を除く): 15243319

約数列:

[1, 5, 7, 11, 13, 25, 29, 35, 55, 65, 77, 91, 143, 145, 175, 203, 275, 319, 325, 377, 385, 455, 715, 725, 841, 1001, 1015, 1595, 1885, 1925, 2233, 2275, 2639, 3575, 4147, 4205, 5005, 5075, 5887, 7975, 9251, 9425, 10933, 11165, 13195, 20735, 21025, 25025, 29029, 29435, 46255, 54665, 55825, 64757, 65975, 76531, 103675, 120263, 145145, 147175, 231275, 273325, 323785, 382655, 601315, 725725, 841841, 1618925, 1913275, 3006575, 4209205, 21046025]

約数ペア:

[(1, 21046025), (5, 4209205), (7, 3006575), (11, 1913275), (13, 1618925), (25, 841841), (29, 725725), (35, 601315), (55, 382655), (65, 323785), (77, 273325), (91, 231275), (143, 147175), (145, 145145), (175, 120263), (203, 103675), (275, 76531), (319, 65975), (325, 64757), (377, 55825), (385, 54665), (455, 46255), (715, 29435), (725, 29029), (841, 25025), (1001, 21025), (1015, 20735), (1595, 13195), (1885, 11165), (1925, 10933), (2233, 9425), (2275, 9251), (2639, 7975), (3575, 5887), (4147, 5075), (4205, 5005)]