28556920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1291}}^1$

素因数の和:1388

約数の個数: 64

約数和(自身を含む): 74419200

約数和(自身を除く): 45862280

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, 1106, 1291, 1580, 2212, 2582, 2765, 3160, 4424, 5164, 5530, 6455, 9037, 10328, 11060, 12910, 18074, 22120, 25820, 36148, 45185, 51640, 72296, 90370, 101989, 180740, 203978, 361480, 407956, 509945, 713923, 815912, 1019890, 1427846, 2039780, 2855692, 3569615, 4079560, 5711384, 7139230, 14278460, 28556920]

約数ペア:

[(1, 28556920), (2, 14278460), (4, 7139230), (5, 5711384), (7, 4079560), (8, 3569615), (10, 2855692), (14, 2039780), (20, 1427846), (28, 1019890), (35, 815912), (40, 713923), (56, 509945), (70, 407956), (79, 361480), (140, 203978), (158, 180740), (280, 101989), (316, 90370), (395, 72296), (553, 51640), (632, 45185), (790, 36148), (1106, 25820), (1291, 22120), (1580, 18074), (2212, 12910), (2582, 11060), (2765, 10328), (3160, 9037), (4424, 6455), (5164, 5530)]