18940840

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1319}}^1$

素因数の和:1689

約数の個数: 32

約数和(自身を含む): 42768000

約数和(自身を除く): 23827160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1319, 1436, 1795, 2638, 2872, 3590, 5276, 6595, 7180, 10552, 13190, 14360, 26380, 52760, 473521, 947042, 1894084, 2367605, 3788168, 4735210, 9470420, 18940840]

約数ペア:

[(1, 18940840), (2, 9470420), (4, 4735210), (5, 3788168), (8, 2367605), (10, 1894084), (20, 947042), (40, 473521), (359, 52760), (718, 26380), (1319, 14360), (1436, 13190), (1795, 10552), (2638, 7180), (2872, 6595), (3590, 5276)]