661220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{4723}}^1$

素因数の和:4739

約数の個数: 24

約数和(自身を含む): 1587264

約数和(自身を除く): 926044

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 4723, 9446, 18892, 23615, 33061, 47230, 66122, 94460, 132244, 165305, 330610, 661220]

約数ペア:

[(1, 661220), (2, 330610), (4, 165305), (5, 132244), (7, 94460), (10, 66122), (14, 47230), (20, 33061), (28, 23615), (35, 18892), (70, 9446), (140, 4723)]