18715000

素因数分解:

$2^3\times 5^4\times {\mathrm{19}}^1\times {\mathrm{197}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 46391400

約数和(自身を除く): 27676400

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 125, 152, 190, 197, 200, 250, 380, 394, 475, 500, 625, 760, 788, 950, 985, 1000, 1250, 1576, 1900, 1970, 2375, 2500, 3743, 3800, 3940, 4750, 4925, 5000, 7486, 7880, 9500, 9850, 11875, 14972, 18715, 19000, 19700, 23750, 24625, 29944, 37430, 39400, 47500, 49250, 74860, 93575, 95000, 98500, 123125, 149720, 187150, 197000, 246250, 374300, 467875, 492500, 748600, 935750, 985000, 1871500, 2339375, 3743000, 4678750, 9357500, 18715000]

約数ペア:

[(1, 18715000), (2, 9357500), (4, 4678750), (5, 3743000), (8, 2339375), (10, 1871500), (19, 985000), (20, 935750), (25, 748600), (38, 492500), (40, 467875), (50, 374300), (76, 246250), (95, 197000), (100, 187150), (125, 149720), (152, 123125), (190, 98500), (197, 95000), (200, 93575), (250, 74860), (380, 49250), (394, 47500), (475, 39400), (500, 37430), (625, 29944), (760, 24625), (788, 23750), (950, 19700), (985, 19000), (1000, 18715), (1250, 14972), (1576, 11875), (1900, 9850), (1970, 9500), (2375, 7880), (2500, 7486), (3743, 5000), (3800, 4925), (3940, 4750)]