16720840

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3191}}^1$

素因数の和:3333

約数の個数: 32

約数和(自身を含む): 37920960

約数和(自身を除く): 21200120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3191, 5240, 6382, 12764, 15955, 25528, 31910, 63820, 127640, 418021, 836042, 1672084, 2090105, 3344168, 4180210, 8360420, 16720840]

約数ペア:

[(1, 16720840), (2, 8360420), (4, 4180210), (5, 3344168), (8, 2090105), (10, 1672084), (20, 836042), (40, 418021), (131, 127640), (262, 63820), (524, 31910), (655, 25528), (1048, 15955), (1310, 12764), (2620, 6382), (3191, 5240)]