21097120

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11987}}^1$

素因数の和:12013

約数の個数: 48

約数和(自身を含む): 54377568

約数和(自身を除く): 33280448

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11987, 23974, 47948, 59935, 95896, 119870, 131857, 191792, 239740, 263714, 383584, 479480, 527428, 659285, 958960, 1054856, 1318570, 1917920, 2109712, 2637140, 4219424, 5274280, 10548560, 21097120]

約数ペア:

[(1, 21097120), (2, 10548560), (4, 5274280), (5, 4219424), (8, 2637140), (10, 2109712), (11, 1917920), (16, 1318570), (20, 1054856), (22, 958960), (32, 659285), (40, 527428), (44, 479480), (55, 383584), (80, 263714), (88, 239740), (110, 191792), (160, 131857), (176, 119870), (220, 95896), (352, 59935), (440, 47948), (880, 23974), (1760, 11987)]