18723340

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{149}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 40622400

約数和(自身を除く): 21899060

約数列:

[1, 2, 4, 5, 10, 20, 61, 103, 122, 149, 206, 244, 298, 305, 412, 515, 596, 610, 745, 1030, 1220, 1490, 2060, 2980, 6283, 9089, 12566, 15347, 18178, 25132, 30694, 31415, 36356, 45445, 61388, 62830, 76735, 90890, 125660, 153470, 181780, 306940, 936167, 1872334, 3744668, 4680835, 9361670, 18723340]

約数ペア:

[(1, 18723340), (2, 9361670), (4, 4680835), (5, 3744668), (10, 1872334), (20, 936167), (61, 306940), (103, 181780), (122, 153470), (149, 125660), (206, 90890), (244, 76735), (298, 62830), (305, 61388), (412, 45445), (515, 36356), (596, 31415), (610, 30694), (745, 25132), (1030, 18178), (1220, 15347), (1490, 12566), (2060, 9089), (2980, 6283)]