3991220

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1013}}^1$

素因数の和:1219

約数の個数: 24

約数和(自身を含む): 8432424

約数和(自身を除く): 4441204

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1013, 1970, 2026, 3940, 4052, 5065, 10130, 20260, 199561, 399122, 798244, 997805, 1995610, 3991220]

約数ペア:

[(1, 3991220), (2, 1995610), (4, 997805), (5, 798244), (10, 399122), (20, 199561), (197, 20260), (394, 10130), (788, 5065), (985, 4052), (1013, 3940), (1970, 2026)]