20199025

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1499}}^1$

素因数の和:1534

約数の個数: 36

約数和(自身を含む): 31806000

約数和(自身を除く): 11606975

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 175, 245, 275, 385, 539, 1225, 1499, 1925, 2695, 7495, 10493, 13475, 16489, 37475, 52465, 73451, 82445, 115423, 262325, 367255, 412225, 577115, 807961, 1836275, 2885575, 4039805, 20199025]

約数ペア:

[(1, 20199025), (5, 4039805), (7, 2885575), (11, 1836275), (25, 807961), (35, 577115), (49, 412225), (55, 367255), (77, 262325), (175, 115423), (245, 82445), (275, 73451), (385, 52465), (539, 37475), (1225, 16489), (1499, 13475), (1925, 10493), (2695, 7495)]