19902890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1811}}^1$

素因数の和:1982

約数の個数: 32

約数和(自身を含む): 41226624

約数和(自身を除く): 21323734

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 157, 314, 785, 1099, 1570, 1811, 2198, 3622, 5495, 9055, 10990, 12677, 18110, 25354, 63385, 126770, 284327, 568654, 1421635, 1990289, 2843270, 3980578, 9951445, 19902890]

約数ペア:

[(1, 19902890), (2, 9951445), (5, 3980578), (7, 2843270), (10, 1990289), (14, 1421635), (35, 568654), (70, 284327), (157, 126770), (314, 63385), (785, 25354), (1099, 18110), (1570, 12677), (1811, 10990), (2198, 9055), (3622, 5495)]