21145390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{457}}^1\times {\mathrm{661}}^1$

素因数の和:1132

約数の個数: 32

約数和(自身を含む): 43660224

約数和(自身を除く): 22514834

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 457, 661, 914, 1322, 2285, 3199, 3305, 4570, 4627, 6398, 6610, 9254, 15995, 23135, 31990, 46270, 302077, 604154, 1510385, 2114539, 3020770, 4229078, 10572695, 21145390]

約数ペア:

[(1, 21145390), (2, 10572695), (5, 4229078), (7, 3020770), (10, 2114539), (14, 1510385), (35, 604154), (70, 302077), (457, 46270), (661, 31990), (914, 23135), (1322, 15995), (2285, 9254), (3199, 6610), (3305, 6398), (4570, 4627)]