20401000

素因数分解:

$2^3\times 5^3\times {\mathrm{23}}^1\times {\mathrm{887}}^1$

素因数の和:931

約数の個数: 64

約数和(自身を含む): 49870080

約数和(自身を除く): 29469080

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 25, 40, 46, 50, 92, 100, 115, 125, 184, 200, 230, 250, 460, 500, 575, 887, 920, 1000, 1150, 1774, 2300, 2875, 3548, 4435, 4600, 5750, 7096, 8870, 11500, 17740, 20401, 22175, 23000, 35480, 40802, 44350, 81604, 88700, 102005, 110875, 163208, 177400, 204010, 221750, 408020, 443500, 510025, 816040, 887000, 1020050, 2040100, 2550125, 4080200, 5100250, 10200500, 20401000]

約数ペア:

[(1, 20401000), (2, 10200500), (4, 5100250), (5, 4080200), (8, 2550125), (10, 2040100), (20, 1020050), (23, 887000), (25, 816040), (40, 510025), (46, 443500), (50, 408020), (92, 221750), (100, 204010), (115, 177400), (125, 163208), (184, 110875), (200, 102005), (230, 88700), (250, 81604), (460, 44350), (500, 40802), (575, 35480), (887, 23000), (920, 22175), (1000, 20401), (1150, 17740), (1774, 11500), (2300, 8870), (2875, 7096), (3548, 5750), (4435, 4600)]