20551760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8287}}^1$

素因数の和:8331

約数の個数: 40

約数和(自身を含む): 49330176

約数和(自身を除く): 28778416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8287, 16574, 33148, 41435, 66296, 82870, 132592, 165740, 256897, 331480, 513794, 662960, 1027588, 1284485, 2055176, 2568970, 4110352, 5137940, 10275880, 20551760]

約数ペア:

[(1, 20551760), (2, 10275880), (4, 5137940), (5, 4110352), (8, 2568970), (10, 2055176), (16, 1284485), (20, 1027588), (31, 662960), (40, 513794), (62, 331480), (80, 256897), (124, 165740), (155, 132592), (248, 82870), (310, 66296), (496, 41435), (620, 33148), (1240, 16574), (2480, 8287)]