278313415

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{21221}}^1$

素因数の和:21330

約数の個数: 16

約数和(自身を含む): 347361696

約数和(自身を除く): 69048281

約数列:

[1, 5, 43, 61, 215, 305, 2623, 13115, 21221, 106105, 912503, 1294481, 4562515, 6472405, 55662683, 278313415]

約数ペア:

[(1, 278313415), (5, 55662683), (43, 6472405), (61, 4562515), (215, 1294481), (305, 912503), (2623, 106105), (13115, 21221)]