21021039

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19963}}^1$

素因数の和:19988

約数の個数: 20

約数和(自身を含む): 33819016

約数和(自身を除く): 12797977

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 19963, 59889, 179667, 259519, 539001, 778557, 1617003, 2335671, 7007013, 21021039]

約数ペア:

[(1, 21021039), (3, 7007013), (9, 2335671), (13, 1617003), (27, 778557), (39, 539001), (81, 259519), (117, 179667), (351, 59889), (1053, 19963)]