21717315

素因数分解:

$3^4\times 5^1\times {\mathrm{53623}}^1$

素因数の和:53640

約数の個数: 20

約数和(自身を含む): 38931024

約数和(自身を除く): 17213709

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53623, 160869, 268115, 482607, 804345, 1447821, 2413035, 4343463, 7239105, 21717315]

約数ペア:

[(1, 21717315), (3, 7239105), (5, 4343463), (9, 2413035), (15, 1447821), (27, 804345), (45, 482607), (81, 268115), (135, 160869), (405, 53623)]