20081860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1229}}^1$

素因数の和:1300

約数の個数: 48

約数和(自身を含む): 45460800

約数和(自身を除く): 25378940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1229, 1634, 2458, 3268, 4085, 4916, 6145, 8170, 12290, 16340, 23351, 24580, 46702, 52847, 93404, 105694, 116755, 211388, 233510, 264235, 467020, 528470, 1004093, 1056940, 2008186, 4016372, 5020465, 10040930, 20081860]

約数ペア:

[(1, 20081860), (2, 10040930), (4, 5020465), (5, 4016372), (10, 2008186), (19, 1056940), (20, 1004093), (38, 528470), (43, 467020), (76, 264235), (86, 233510), (95, 211388), (172, 116755), (190, 105694), (215, 93404), (380, 52847), (430, 46702), (817, 24580), (860, 23351), (1229, 16340), (1634, 12290), (2458, 8170), (3268, 6145), (4085, 4916)]