18519640

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6521}}^1$

素因数の和:6603

約数の個数: 32

約数和(自身を含む): 42262560

約数和(自身を除く): 23742920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6521, 13042, 26084, 32605, 52168, 65210, 130420, 260840, 462991, 925982, 1851964, 2314955, 3703928, 4629910, 9259820, 18519640]

約数ペア:

[(1, 18519640), (2, 9259820), (4, 4629910), (5, 3703928), (8, 2314955), (10, 1851964), (20, 925982), (40, 462991), (71, 260840), (142, 130420), (284, 65210), (355, 52168), (568, 32605), (710, 26084), (1420, 13042), (2840, 6521)]