20654680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16657}}^1$

素因数の和:16699

約数の個数: 32

約数和(自身を含む): 47975040

約数和(自身を除く): 27320360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16657, 33314, 66628, 83285, 133256, 166570, 333140, 516367, 666280, 1032734, 2065468, 2581835, 4130936, 5163670, 10327340, 20654680]

約数ペア:

[(1, 20654680), (2, 10327340), (4, 5163670), (5, 4130936), (8, 2581835), (10, 2065468), (20, 1032734), (31, 666280), (40, 516367), (62, 333140), (124, 166570), (155, 133256), (248, 83285), (310, 66628), (620, 33314), (1240, 16657)]