20017980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{111211}}^1$

素因数の和:111226

約数の個数: 36

約数和(自身を含む): 60721752

約数和(自身を除く): 40703772

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 111211, 222422, 333633, 444844, 556055, 667266, 1000899, 1112110, 1334532, 1668165, 2001798, 2224220, 3336330, 4003596, 5004495, 6672660, 10008990, 20017980]

約数ペア:

[(1, 20017980), (2, 10008990), (3, 6672660), (4, 5004495), (5, 4003596), (6, 3336330), (9, 2224220), (10, 2001798), (12, 1668165), (15, 1334532), (18, 1112110), (20, 1000899), (30, 667266), (36, 556055), (45, 444844), (60, 333633), (90, 222422), (180, 111211)]