21481075

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{11159}}^1$

素因数の和:11187

約数の個数: 24

約数和(自身を含む): 33212160

約数和(自身を除く): 11731085

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925, 11159, 55795, 78113, 122749, 278975, 390565, 613745, 859243, 1952825, 3068725, 4296215, 21481075]

約数ペア:

[(1, 21481075), (5, 4296215), (7, 3068725), (11, 1952825), (25, 859243), (35, 613745), (55, 390565), (77, 278975), (175, 122749), (275, 78113), (385, 55795), (1925, 11159)]