20917225

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 11223575

約数列:

[1, 5, 7, 17, 25, 35, 79, 85, 89, 119, 175, 395, 425, 445, 553, 595, 623, 1343, 1513, 1975, 2225, 2765, 2975, 3115, 6715, 7031, 7565, 9401, 10591, 13825, 15575, 33575, 35155, 37825, 47005, 49217, 52955, 119527, 175775, 235025, 246085, 264775, 597635, 836689, 1230425, 2988175, 4183445, 20917225]

約数ペア:

[(1, 20917225), (5, 4183445), (7, 2988175), (17, 1230425), (25, 836689), (35, 597635), (79, 264775), (85, 246085), (89, 235025), (119, 175775), (175, 119527), (395, 52955), (425, 49217), (445, 47005), (553, 37825), (595, 35155), (623, 33575), (1343, 15575), (1513, 13825), (1975, 10591), (2225, 9401), (2765, 7565), (2975, 7031), (3115, 6715)]