21680525

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{367}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 28748160

約数和(自身を除く): 7067635

約数列:

[1, 5, 17, 25, 85, 139, 367, 425, 695, 1835, 2363, 3475, 6239, 9175, 11815, 31195, 51013, 59075, 155975, 255065, 867221, 1275325, 4336105, 21680525]

約数ペア:

[(1, 21680525), (5, 4336105), (17, 1275325), (25, 867221), (85, 255065), (139, 155975), (367, 59075), (425, 51013), (695, 31195), (1835, 11815), (2363, 9175), (3475, 6239)]