20812100

素因数分解:

$2^2\times 5^2\times {\mathrm{208121}}^1$

素因数の和:208135

約数の個数: 18

約数和(自身を含む): 45162474

約数和(自身を除く): 24350374

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 208121, 416242, 832484, 1040605, 2081210, 4162420, 5203025, 10406050, 20812100]

約数ペア:

[(1, 20812100), (2, 10406050), (4, 5203025), (5, 4162420), (10, 2081210), (20, 1040605), (25, 832484), (50, 416242), (100, 208121)]