400804525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{971}}^1$

素因数の和:1090

約数の個数: 48

約数和(自身を含む): 578534400

約数和(自身を除く): 177729875

約数列:

[1, 5, 11, 19, 25, 55, 79, 95, 209, 275, 395, 475, 869, 971, 1045, 1501, 1975, 4345, 4855, 5225, 7505, 10681, 16511, 18449, 21725, 24275, 37525, 53405, 76709, 82555, 92245, 202939, 267025, 383545, 412775, 461225, 843799, 1014695, 1457471, 1917725, 4218995, 5073475, 7287355, 16032181, 21094975, 36436775, 80160905, 400804525]

約数ペア:

[(1, 400804525), (5, 80160905), (11, 36436775), (19, 21094975), (25, 16032181), (55, 7287355), (79, 5073475), (95, 4218995), (209, 1917725), (275, 1457471), (395, 1014695), (475, 843799), (869, 461225), (971, 412775), (1045, 383545), (1501, 267025), (1975, 202939), (4345, 92245), (4855, 82555), (5225, 76709), (7505, 53405), (10681, 37525), (16511, 24275), (18449, 21725)]