20718555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{743}}^1$

素因数の和:788

約数の個数: 48

約数和(自身を含む): 39211776

約数和(自身を除く): 18493221

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 65, 143, 165, 169, 195, 429, 507, 715, 743, 845, 1859, 2145, 2229, 2535, 3715, 5577, 8173, 9295, 9659, 11145, 24519, 27885, 28977, 40865, 48295, 106249, 122595, 125567, 144885, 318747, 376701, 531245, 627835, 1381237, 1593735, 1883505, 4143711, 6906185, 20718555]

約数ペア:

[(1, 20718555), (3, 6906185), (5, 4143711), (11, 1883505), (13, 1593735), (15, 1381237), (33, 627835), (39, 531245), (55, 376701), (65, 318747), (143, 144885), (165, 125567), (169, 122595), (195, 106249), (429, 48295), (507, 40865), (715, 28977), (743, 27885), (845, 24519), (1859, 11145), (2145, 9659), (2229, 9295), (2535, 8173), (3715, 5577)]