21298750

素因数分解:

$2^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{1549}}^1$

素因数の和:1582

約数の個数: 40

約数和(自身を含む): 43579800

約数和(自身を除く): 22281050

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 125, 250, 275, 550, 625, 1250, 1375, 1549, 2750, 3098, 6875, 7745, 13750, 15490, 17039, 34078, 38725, 77450, 85195, 170390, 193625, 387250, 425975, 851950, 968125, 1936250, 2129875, 4259750, 10649375, 21298750]

約数ペア:

[(1, 21298750), (2, 10649375), (5, 4259750), (10, 2129875), (11, 1936250), (22, 968125), (25, 851950), (50, 425975), (55, 387250), (110, 193625), (125, 170390), (250, 85195), (275, 77450), (550, 38725), (625, 34078), (1250, 17039), (1375, 15490), (1549, 13750), (2750, 7745), (3098, 6875)]