21047425

素因数分解:

$5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2797}}^1$

素因数の和:2857

約数の個数: 24

約数和(自身を含む): 30531776

約数和(自身を除く): 9484351

約数列:

[1, 5, 7, 25, 35, 43, 175, 215, 301, 1075, 1505, 2797, 7525, 13985, 19579, 69925, 97895, 120271, 489475, 601355, 841897, 3006775, 4209485, 21047425]

約数ペア:

[(1, 21047425), (5, 4209485), (7, 3006775), (25, 841897), (35, 601355), (43, 489475), (175, 120271), (215, 97895), (301, 69925), (1075, 19579), (1505, 13985), (2797, 7525)]