1990218375

素因数分解:

$3^2\times 5^3\times {\mathrm{743}}^1\times {\mathrm{2381}}^1$

素因数の和:3145

約数の個数: 48

約数和(自身を含む): 3594037824

約数和(自身を除く): 1603819449

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 743, 1125, 2229, 2381, 3715, 6687, 7143, 11145, 11905, 18575, 21429, 33435, 35715, 55725, 59525, 92875, 107145, 167175, 178575, 278625, 297625, 535725, 835875, 892875, 1769083, 2678625, 5307249, 8845415, 15921747, 26536245, 44227075, 79608735, 132681225, 221135375, 398043675, 663406125, 1990218375]

約数ペア:

[(1, 1990218375), (3, 663406125), (5, 398043675), (9, 221135375), (15, 132681225), (25, 79608735), (45, 44227075), (75, 26536245), (125, 15921747), (225, 8845415), (375, 5307249), (743, 2678625), (1125, 1769083), (2229, 892875), (2381, 835875), (3715, 535725), (6687, 297625), (7143, 278625), (11145, 178575), (11905, 167175), (18575, 107145), (21429, 92875), (33435, 59525), (35715, 55725)]