21182500

素因数分解:

$2^2\times 5^4\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:290

約数の個数: 60

約数和(自身を含む): 47781580

約数和(自身を除く): 26599080

約数列:

[1, 2, 4, 5, 10, 20, 25, 37, 50, 74, 100, 125, 148, 185, 229, 250, 370, 458, 500, 625, 740, 916, 925, 1145, 1250, 1850, 2290, 2500, 3700, 4580, 4625, 5725, 8473, 9250, 11450, 16946, 18500, 22900, 23125, 28625, 33892, 42365, 46250, 57250, 84730, 92500, 114500, 143125, 169460, 211825, 286250, 423650, 572500, 847300, 1059125, 2118250, 4236500, 5295625, 10591250, 21182500]

約数ペア:

[(1, 21182500), (2, 10591250), (4, 5295625), (5, 4236500), (10, 2118250), (20, 1059125), (25, 847300), (37, 572500), (50, 423650), (74, 286250), (100, 211825), (125, 169460), (148, 143125), (185, 114500), (229, 92500), (250, 84730), (370, 57250), (458, 46250), (500, 42365), (625, 33892), (740, 28625), (916, 23125), (925, 22900), (1145, 18500), (1250, 16946), (1850, 11450), (2290, 9250), (2500, 8473), (3700, 5725), (4580, 4625)]