19990490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{367}}^1\times {\mathrm{419}}^1$

素因数の和:806

約数の個数: 32

約数和(自身を含む): 38949120

約数和(自身を除く): 18958630

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 367, 419, 734, 838, 1835, 2095, 3670, 4190, 4771, 5447, 9542, 10894, 23855, 27235, 47710, 54470, 153773, 307546, 768865, 1537730, 1999049, 3998098, 9995245, 19990490]

約数ペア:

[(1, 19990490), (2, 9995245), (5, 3998098), (10, 1999049), (13, 1537730), (26, 768865), (65, 307546), (130, 153773), (367, 54470), (419, 47710), (734, 27235), (838, 23855), (1835, 10894), (2095, 9542), (3670, 5447), (4190, 4771)]