19191820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15731}}^1$

素因数の和:15801

約数の個数: 24

約数和(自身を含む): 40966128

約数和(自身を除く): 21774308

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 15731, 31462, 62924, 78655, 157310, 314620, 959591, 1919182, 3838364, 4797955, 9595910, 19191820]

約数ペア:

[(1, 19191820), (2, 9595910), (4, 4797955), (5, 3838364), (10, 1919182), (20, 959591), (61, 314620), (122, 157310), (244, 78655), (305, 62924), (610, 31462), (1220, 15731)]