20807540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{419}}^1$

素因数の和:632

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 26608780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 191, 260, 382, 419, 764, 838, 955, 1676, 1910, 2095, 2483, 3820, 4190, 4966, 5447, 8380, 9932, 10894, 12415, 21788, 24830, 27235, 49660, 54470, 80029, 108940, 160058, 320116, 400145, 800290, 1040377, 1600580, 2080754, 4161508, 5201885, 10403770, 20807540]

約数ペア:

[(1, 20807540), (2, 10403770), (4, 5201885), (5, 4161508), (10, 2080754), (13, 1600580), (20, 1040377), (26, 800290), (52, 400145), (65, 320116), (130, 160058), (191, 108940), (260, 80029), (382, 54470), (419, 49660), (764, 27235), (838, 24830), (955, 21788), (1676, 12415), (1910, 10894), (2095, 9932), (2483, 8380), (3820, 5447), (4190, 4966)]