21987290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{9949}}^1$

素因数の和:9986

約数の個数: 32

約数和(自身を含む): 45133200

約数和(自身を除く): 23145910

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 130, 170, 221, 442, 1105, 2210, 9949, 19898, 49745, 99490, 129337, 169133, 258674, 338266, 646685, 845665, 1293370, 1691330, 2198729, 4397458, 10993645, 21987290]

約数ペア:

[(1, 21987290), (2, 10993645), (5, 4397458), (10, 2198729), (13, 1691330), (17, 1293370), (26, 845665), (34, 646685), (65, 338266), (85, 258674), (130, 169133), (170, 129337), (221, 99490), (442, 49745), (1105, 19898), (2210, 9949)]