21780970

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{24473}}^1$

素因数の和:24569

約数の個数: 16

約数和(自身を含む): 39647880

約数和(自身を除く): 17866910

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 24473, 48946, 122365, 244730, 2178097, 4356194, 10890485, 21780970]

約数ペア:

[(1, 21780970), (2, 10890485), (5, 4356194), (10, 2178097), (89, 244730), (178, 122365), (445, 48946), (890, 24473)]