28180720

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2689}}^1$

素因数の和:2833

約数の個数: 40

約数和(自身を含む): 66044880

約数和(自身を除く): 37864160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2096, 2620, 2689, 5240, 5378, 10480, 10756, 13445, 21512, 26890, 43024, 53780, 107560, 215120, 352259, 704518, 1409036, 1761295, 2818072, 3522590, 5636144, 7045180, 14090360, 28180720]

約数ペア:

[(1, 28180720), (2, 14090360), (4, 7045180), (5, 5636144), (8, 3522590), (10, 2818072), (16, 1761295), (20, 1409036), (40, 704518), (80, 352259), (131, 215120), (262, 107560), (524, 53780), (655, 43024), (1048, 26890), (1310, 21512), (2096, 13445), (2620, 10756), (2689, 10480), (5240, 5378)]