20697100

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{1489}}^1$

素因数の和:1642

約数の個数: 36

約数和(自身を含む): 45266200

約数和(自身を除く): 24569100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 1489, 2780, 2978, 3475, 5956, 6950, 7445, 13900, 14890, 29780, 37225, 74450, 148900, 206971, 413942, 827884, 1034855, 2069710, 4139420, 5174275, 10348550, 20697100]

約数ペア:

[(1, 20697100), (2, 10348550), (4, 5174275), (5, 4139420), (10, 2069710), (20, 1034855), (25, 827884), (50, 413942), (100, 206971), (139, 148900), (278, 74450), (556, 37225), (695, 29780), (1390, 14890), (1489, 13900), (2780, 7445), (2978, 6950), (3475, 5956)]