161990000

素因数分解:

$2^4\times 5^4\times {\mathrm{97}}^1\times {\mathrm{167}}^1$

素因数の和:292

約数の個数: 100

約数和(自身を含む): 398609904

約数和(自身を除く): 236619904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 97, 100, 125, 167, 194, 200, 250, 334, 388, 400, 485, 500, 625, 668, 776, 835, 970, 1000, 1250, 1336, 1552, 1670, 1940, 2000, 2425, 2500, 2672, 3340, 3880, 4175, 4850, 5000, 6680, 7760, 8350, 9700, 10000, 12125, 13360, 16199, 16700, 19400, 20875, 24250, 32398, 33400, 38800, 41750, 48500, 60625, 64796, 66800, 80995, 83500, 97000, 104375, 121250, 129592, 161990, 167000, 194000, 208750, 242500, 259184, 323980, 334000, 404975, 417500, 485000, 647960, 809950, 835000, 970000, 1295920, 1619900, 1670000, 2024875, 3239800, 4049750, 6479600, 8099500, 10124375, 16199000, 20248750, 32398000, 40497500, 80995000, 161990000]

約数ペア:

[(1, 161990000), (2, 80995000), (4, 40497500), (5, 32398000), (8, 20248750), (10, 16199000), (16, 10124375), (20, 8099500), (25, 6479600), (40, 4049750), (50, 3239800), (80, 2024875), (97, 1670000), (100, 1619900), (125, 1295920), (167, 970000), (194, 835000), (200, 809950), (250, 647960), (334, 485000), (388, 417500), (400, 404975), (485, 334000), (500, 323980), (625, 259184), (668, 242500), (776, 208750), (835, 194000), (970, 167000), (1000, 161990), (1250, 129592), (1336, 121250), (1552, 104375), (1670, 97000), (1940, 83500), (2000, 80995), (2425, 66800), (2500, 64796), (2672, 60625), (3340, 48500), (3880, 41750), (4175, 38800), (4850, 33400), (5000, 32398), (6680, 24250), (7760, 20875), (8350, 19400), (9700, 16700), (10000, 16199), (12125, 13360)]