21516885

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36781}}^1$

素因数の和:36805

約数の個数: 24

約数和(自身を含む): 40165944

約数和(自身を除く): 18649059

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36781, 110343, 183905, 331029, 478153, 551715, 1434459, 1655145, 2390765, 4303377, 7172295, 21516885]

約数ペア:

[(1, 21516885), (3, 7172295), (5, 4303377), (9, 2390765), (13, 1655145), (15, 1434459), (39, 551715), (45, 478153), (65, 331029), (117, 183905), (195, 110343), (585, 36781)]