21378580

素因数分解:

$2^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{7079}}^1$

素因数の和:7239

約数の個数: 24

約数和(自身を含む): 45198720

約数和(自身を除く): 23820140

約数列:

[1, 2, 4, 5, 10, 20, 151, 302, 604, 755, 1510, 3020, 7079, 14158, 28316, 35395, 70790, 141580, 1068929, 2137858, 4275716, 5344645, 10689290, 21378580]

約数ペア:

[(1, 21378580), (2, 10689290), (4, 5344645), (5, 4275716), (10, 2137858), (20, 1068929), (151, 141580), (302, 70790), (604, 35395), (755, 28316), (1510, 14158), (3020, 7079)]