21206780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151477}}^1$

素因数の和:151493

約数の個数: 24

約数和(自身を含む): 50896608

約数和(自身を除く): 29689828

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151477, 302954, 605908, 757385, 1060339, 1514770, 2120678, 3029540, 4241356, 5301695, 10603390, 21206780]

約数ペア:

[(1, 21206780), (2, 10603390), (4, 5301695), (5, 4241356), (7, 3029540), (10, 2120678), (14, 1514770), (20, 1060339), (28, 757385), (35, 605908), (70, 302954), (140, 151477)]