21472409

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{677}}^1$

素因数の和:904

約数の個数: 16

約数和(自身を含む): 25774848

約数和(自身を除く): 4302439

約数列:

[1, 7, 23, 161, 197, 677, 1379, 4531, 4739, 15571, 31717, 108997, 133369, 933583, 3067487, 21472409]

約数ペア:

[(1, 21472409), (7, 3067487), (23, 933583), (161, 133369), (197, 108997), (677, 31717), (1379, 15571), (4531, 4739)]