21981160

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4327}}^1$

素因数の和:4465

約数の個数: 32

約数和(自身を含む): 49858560

約数和(自身を除く): 27877400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4327, 5080, 8654, 17308, 21635, 34616, 43270, 86540, 173080, 549529, 1099058, 2198116, 2747645, 4396232, 5495290, 10990580, 21981160]

約数ペア:

[(1, 21981160), (2, 10990580), (4, 5495290), (5, 4396232), (8, 2747645), (10, 2198116), (20, 1099058), (40, 549529), (127, 173080), (254, 86540), (508, 43270), (635, 34616), (1016, 21635), (1270, 17308), (2540, 8654), (4327, 5080)]