18978428

素因数分解:

$2^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{4549}}^1$

素因数の和:4709

約数の個数: 24

約数和(自身を含む): 38220000

約数和(自身を除く): 19241572

約数列:

[1, 2, 4, 7, 14, 28, 149, 298, 596, 1043, 2086, 4172, 4549, 9098, 18196, 31843, 63686, 127372, 677801, 1355602, 2711204, 4744607, 9489214, 18978428]

約数ペア:

[(1, 18978428), (2, 9489214), (4, 4744607), (7, 2711204), (14, 1355602), (28, 677801), (149, 127372), (298, 63686), (596, 31843), (1043, 18196), (2086, 9098), (4172, 4549)]