639872500

素因数分解:

$2^2\times 5^4\times {\mathrm{19}}^2\times {\mathrm{709}}^1$

素因数の和:771

約数の個数: 90

約数和(自身を含む): 1478878170

約数和(自身を除く): 839005670

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 361, 380, 475, 500, 625, 709, 722, 950, 1250, 1418, 1444, 1805, 1900, 2375, 2500, 2836, 3545, 3610, 4750, 7090, 7220, 9025, 9500, 11875, 13471, 14180, 17725, 18050, 23750, 26942, 35450, 36100, 45125, 47500, 53884, 67355, 70900, 88625, 90250, 134710, 177250, 180500, 225625, 255949, 269420, 336775, 354500, 443125, 451250, 511898, 673550, 886250, 902500, 1023796, 1279745, 1347100, 1683875, 1772500, 2559490, 3367750, 5118980, 6398725, 6735500, 8419375, 12797450, 16838750, 25594900, 31993625, 33677500, 63987250, 127974500, 159968125, 319936250, 639872500]

約数ペア:

[(1, 639872500), (2, 319936250), (4, 159968125), (5, 127974500), (10, 63987250), (19, 33677500), (20, 31993625), (25, 25594900), (38, 16838750), (50, 12797450), (76, 8419375), (95, 6735500), (100, 6398725), (125, 5118980), (190, 3367750), (250, 2559490), (361, 1772500), (380, 1683875), (475, 1347100), (500, 1279745), (625, 1023796), (709, 902500), (722, 886250), (950, 673550), (1250, 511898), (1418, 451250), (1444, 443125), (1805, 354500), (1900, 336775), (2375, 269420), (2500, 255949), (2836, 225625), (3545, 180500), (3610, 177250), (4750, 134710), (7090, 90250), (7220, 88625), (9025, 70900), (9500, 67355), (11875, 53884), (13471, 47500), (14180, 45125), (17725, 36100), (18050, 35450), (23750, 26942)]