28561880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 66484800

約数和(自身を除く): 37922920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 89, 113, 142, 178, 226, 284, 355, 356, 445, 452, 565, 568, 710, 712, 890, 904, 1130, 1420, 1780, 2260, 2840, 3560, 4520, 6319, 8023, 10057, 12638, 16046, 20114, 25276, 31595, 32092, 40115, 40228, 50285, 50552, 63190, 64184, 80230, 80456, 100570, 126380, 160460, 201140, 252760, 320920, 402280, 714047, 1428094, 2856188, 3570235, 5712376, 7140470, 14280940, 28561880]

約数ペア:

[(1, 28561880), (2, 14280940), (4, 7140470), (5, 5712376), (8, 3570235), (10, 2856188), (20, 1428094), (40, 714047), (71, 402280), (89, 320920), (113, 252760), (142, 201140), (178, 160460), (226, 126380), (284, 100570), (355, 80456), (356, 80230), (445, 64184), (452, 63190), (565, 50552), (568, 50285), (710, 40228), (712, 40115), (890, 32092), (904, 31595), (1130, 25276), (1420, 20114), (1780, 16046), (2260, 12638), (2840, 10057), (3560, 8023), (4520, 6319)]