80843750

素因数分解:

$2^1\times 5^6\times {\mathrm{13}}^1\times {\mathrm{199}}^1$

素因数の和:244

約数の個数: 56

約数和(自身を含む): 164060400

約数和(自身を除く): 83216650

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 199, 250, 325, 398, 625, 650, 995, 1250, 1625, 1990, 2587, 3125, 3250, 4975, 5174, 6250, 8125, 9950, 12935, 15625, 16250, 24875, 25870, 31250, 40625, 49750, 64675, 81250, 124375, 129350, 203125, 248750, 323375, 406250, 621875, 646750, 1243750, 1616875, 3109375, 3233750, 6218750, 8084375, 16168750, 40421875, 80843750]

約数ペア:

[(1, 80843750), (2, 40421875), (5, 16168750), (10, 8084375), (13, 6218750), (25, 3233750), (26, 3109375), (50, 1616875), (65, 1243750), (125, 646750), (130, 621875), (199, 406250), (250, 323375), (325, 248750), (398, 203125), (625, 129350), (650, 124375), (995, 81250), (1250, 64675), (1625, 49750), (1990, 40625), (2587, 31250), (3125, 25870), (3250, 24875), (4975, 16250), (5174, 15625), (6250, 12935), (8125, 9950)]