3989500

素因数分解:

$2^2\times 5^3\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:199

約数の個数: 48

約数和(自身を含む): 8910720

約数和(自身を除く): 4921220

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 101, 125, 158, 202, 250, 316, 395, 404, 500, 505, 790, 1010, 1580, 1975, 2020, 2525, 3950, 5050, 7900, 7979, 9875, 10100, 12625, 15958, 19750, 25250, 31916, 39500, 39895, 50500, 79790, 159580, 199475, 398950, 797900, 997375, 1994750, 3989500]

約数ペア:

[(1, 3989500), (2, 1994750), (4, 997375), (5, 797900), (10, 398950), (20, 199475), (25, 159580), (50, 79790), (79, 50500), (100, 39895), (101, 39500), (125, 31916), (158, 25250), (202, 19750), (250, 15958), (316, 12625), (395, 10100), (404, 9875), (500, 7979), (505, 7900), (790, 5050), (1010, 3950), (1580, 2525), (1975, 2020)]