19720015

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{13103}}^1$

素因数の和:13158

約数の個数: 16

約数和(自身を含む): 27675648

約数和(自身を除く): 7955633

約数列:

[1, 5, 7, 35, 43, 215, 301, 1505, 13103, 65515, 91721, 458605, 563429, 2817145, 3944003, 19720015]

約数ペア:

[(1, 19720015), (5, 3944003), (7, 2817145), (35, 563429), (43, 458605), (215, 91721), (301, 65515), (1505, 13103)]