28487920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20947}}^1$

素因数の和:20977

約数の個数: 40

約数和(自身を含む): 70133904

約数和(自身を除く): 41645984

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 20947, 41894, 83788, 104735, 167576, 209470, 335152, 356099, 418940, 712198, 837880, 1424396, 1675760, 1780495, 2848792, 3560990, 5697584, 7121980, 14243960, 28487920]

約数ペア:

[(1, 28487920), (2, 14243960), (4, 7121980), (5, 5697584), (8, 3560990), (10, 2848792), (16, 1780495), (17, 1675760), (20, 1424396), (34, 837880), (40, 712198), (68, 418940), (80, 356099), (85, 335152), (136, 209470), (170, 167576), (272, 104735), (340, 83788), (680, 41894), (1360, 20947)]