20726440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{937}}^1$

素因数の和:1034

約数の個数: 64

約数和(自身を含む): 54028800

約数和(自身を除く): 33302360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 937, 1106, 1580, 1874, 2212, 2765, 3160, 3748, 4424, 4685, 5530, 6559, 7496, 9370, 11060, 13118, 18740, 22120, 26236, 32795, 37480, 52472, 65590, 74023, 131180, 148046, 262360, 296092, 370115, 518161, 592184, 740230, 1036322, 1480460, 2072644, 2590805, 2960920, 4145288, 5181610, 10363220, 20726440]

約数ペア:

[(1, 20726440), (2, 10363220), (4, 5181610), (5, 4145288), (7, 2960920), (8, 2590805), (10, 2072644), (14, 1480460), (20, 1036322), (28, 740230), (35, 592184), (40, 518161), (56, 370115), (70, 296092), (79, 262360), (140, 148046), (158, 131180), (280, 74023), (316, 65590), (395, 52472), (553, 37480), (632, 32795), (790, 26236), (937, 22120), (1106, 18740), (1580, 13118), (1874, 11060), (2212, 9370), (2765, 7496), (3160, 6559), (3748, 5530), (4424, 4685)]