19777880

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4621}}^1$

素因数の和:4739

約数の個数: 32

約数和(自身を含む): 44925840

約数和(自身を除く): 25147960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4621, 9242, 18484, 23105, 36968, 46210, 92420, 184840, 494447, 988894, 1977788, 2472235, 3955576, 4944470, 9888940, 19777880]

約数ペア:

[(1, 19777880), (2, 9888940), (4, 4944470), (5, 3955576), (8, 2472235), (10, 1977788), (20, 988894), (40, 494447), (107, 184840), (214, 92420), (428, 46210), (535, 36968), (856, 23105), (1070, 18484), (2140, 9242), (4280, 4621)]