20581220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5503}}^1$

素因数の和:5540

約数の個数: 48

約数和(自身を含む): 49932288

約数和(自身を除く): 29351068

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5503, 11006, 22012, 27515, 55030, 60533, 93551, 110060, 121066, 187102, 242132, 302665, 374204, 467755, 605330, 935510, 1029061, 1210660, 1871020, 2058122, 4116244, 5145305, 10290610, 20581220]

約数ペア:

[(1, 20581220), (2, 10290610), (4, 5145305), (5, 4116244), (10, 2058122), (11, 1871020), (17, 1210660), (20, 1029061), (22, 935510), (34, 605330), (44, 467755), (55, 374204), (68, 302665), (85, 242132), (110, 187102), (170, 121066), (187, 110060), (220, 93551), (340, 60533), (374, 55030), (748, 27515), (935, 22012), (1870, 11006), (3740, 5503)]