19801509

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{72533}}^1$

素因数の和:72556

約数の個数: 16

約数和(自身を含む): 32495232

約数和(自身を除く): 12693723

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 72533, 217599, 507731, 942929, 1523193, 2828787, 6600503, 19801509]

約数ペア:

[(1, 19801509), (3, 6600503), (7, 2828787), (13, 1523193), (21, 942929), (39, 507731), (91, 217599), (273, 72533)]