21216860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151549}}^1$

素因数の和:151565

約数の個数: 24

約数和(自身を含む): 50920800

約数和(自身を除く): 29703940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151549, 303098, 606196, 757745, 1060843, 1515490, 2121686, 3030980, 4243372, 5304215, 10608430, 21216860]

約数ペア:

[(1, 21216860), (2, 10608430), (4, 5304215), (5, 4243372), (7, 3030980), (10, 2121686), (14, 1515490), (20, 1060843), (28, 757745), (35, 606196), (70, 303098), (140, 151549)]