18978988

素因数分解:

$2^2\times 7^1\times {\mathrm{521}}^1\times {\mathrm{1301}}^1$

素因数の和:1833

約数の個数: 24

約数和(自身を含む): 38060064

約数和(自身を除く): 19081076

約数列:

[1, 2, 4, 7, 14, 28, 521, 1042, 1301, 2084, 2602, 3647, 5204, 7294, 9107, 14588, 18214, 36428, 677821, 1355642, 2711284, 4744747, 9489494, 18978988]

約数ペア:

[(1, 18978988), (2, 9489494), (4, 4744747), (7, 2711284), (14, 1355642), (28, 677821), (521, 36428), (1042, 18214), (1301, 14588), (2084, 9107), (2602, 7294), (3647, 5204)]