21307790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7079}}^1$

素因数の和:7136

約数の個数: 32

約数和(自身を含む): 44858880

約数和(自身を除く): 23551090

約数列:

[1, 2, 5, 7, 10, 14, 35, 43, 70, 86, 215, 301, 430, 602, 1505, 3010, 7079, 14158, 35395, 49553, 70790, 99106, 247765, 304397, 495530, 608794, 1521985, 2130779, 3043970, 4261558, 10653895, 21307790]

約数ペア:

[(1, 21307790), (2, 10653895), (5, 4261558), (7, 3043970), (10, 2130779), (14, 1521985), (35, 608794), (43, 495530), (70, 304397), (86, 247765), (215, 99106), (301, 70790), (430, 49553), (602, 35395), (1505, 14158), (3010, 7079)]