21156940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151121}}^1$

素因数の和:151137

約数の個数: 24

約数和(自身を含む): 50776992

約数和(自身を除く): 29620052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151121, 302242, 604484, 755605, 1057847, 1511210, 2115694, 3022420, 4231388, 5289235, 10578470, 21156940]

約数ペア:

[(1, 21156940), (2, 10578470), (4, 5289235), (5, 4231388), (7, 3022420), (10, 2115694), (14, 1511210), (20, 1057847), (28, 755605), (35, 604484), (70, 302242), (140, 151121)]