400679920

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{127}}^1\times {\mathrm{349}}^1$

素因数の和:602

約数の個数: 80

約数和(自身を含む): 949939200

約数和(自身を除く): 549259280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 127, 226, 254, 349, 452, 508, 565, 635, 698, 904, 1016, 1130, 1270, 1396, 1745, 1808, 2032, 2260, 2540, 2792, 3490, 4520, 5080, 5584, 6980, 9040, 10160, 13960, 14351, 27920, 28702, 39437, 44323, 57404, 71755, 78874, 88646, 114808, 143510, 157748, 177292, 197185, 221615, 229616, 287020, 315496, 354584, 394370, 443230, 574040, 630992, 709168, 788740, 886460, 1148080, 1577480, 1772920, 3154960, 3545840, 5008499, 10016998, 20033996, 25042495, 40067992, 50084990, 80135984, 100169980, 200339960, 400679920]

約数ペア:

[(1, 400679920), (2, 200339960), (4, 100169980), (5, 80135984), (8, 50084990), (10, 40067992), (16, 25042495), (20, 20033996), (40, 10016998), (80, 5008499), (113, 3545840), (127, 3154960), (226, 1772920), (254, 1577480), (349, 1148080), (452, 886460), (508, 788740), (565, 709168), (635, 630992), (698, 574040), (904, 443230), (1016, 394370), (1130, 354584), (1270, 315496), (1396, 287020), (1745, 229616), (1808, 221615), (2032, 197185), (2260, 177292), (2540, 157748), (2792, 143510), (3490, 114808), (4520, 88646), (5080, 78874), (5584, 71755), (6980, 57404), (9040, 44323), (10160, 39437), (13960, 28702), (14351, 27920)]