20980750

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{631}}^1$

素因数の和:674

約数の個数: 64

約数和(自身を含む): 47324160

約数和(自身を除く): 26343410

約数列:

[1, 2, 5, 7, 10, 14, 19, 25, 35, 38, 50, 70, 95, 125, 133, 175, 190, 250, 266, 350, 475, 631, 665, 875, 950, 1262, 1330, 1750, 2375, 3155, 3325, 4417, 4750, 6310, 6650, 8834, 11989, 15775, 16625, 22085, 23978, 31550, 33250, 44170, 59945, 78875, 83923, 110425, 119890, 157750, 167846, 220850, 299725, 419615, 552125, 599450, 839230, 1104250, 1498625, 2098075, 2997250, 4196150, 10490375, 20980750]

約数ペア:

[(1, 20980750), (2, 10490375), (5, 4196150), (7, 2997250), (10, 2098075), (14, 1498625), (19, 1104250), (25, 839230), (35, 599450), (38, 552125), (50, 419615), (70, 299725), (95, 220850), (125, 167846), (133, 157750), (175, 119890), (190, 110425), (250, 83923), (266, 78875), (350, 59945), (475, 44170), (631, 33250), (665, 31550), (875, 23978), (950, 22085), (1262, 16625), (1330, 15775), (1750, 11989), (2375, 8834), (3155, 6650), (3325, 6310), (4417, 4750)]