28987000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:170

約数の個数: 128

約数和(自身を含む): 80196480

約数和(自身を除く): 51209480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 41, 50, 56, 70, 82, 100, 101, 125, 140, 164, 175, 200, 202, 205, 250, 280, 287, 328, 350, 404, 410, 500, 505, 574, 700, 707, 808, 820, 875, 1000, 1010, 1025, 1148, 1400, 1414, 1435, 1640, 1750, 2020, 2050, 2296, 2525, 2828, 2870, 3500, 3535, 4040, 4100, 4141, 5050, 5125, 5656, 5740, 7000, 7070, 7175, 8200, 8282, 10100, 10250, 11480, 12625, 14140, 14350, 16564, 17675, 20200, 20500, 20705, 25250, 28280, 28700, 28987, 33128, 35350, 35875, 41000, 41410, 50500, 57400, 57974, 70700, 71750, 82820, 88375, 101000, 103525, 115948, 141400, 143500, 144935, 165640, 176750, 207050, 231896, 287000, 289870, 353500, 414100, 517625, 579740, 707000, 724675, 828200, 1035250, 1159480, 1449350, 2070500, 2898700, 3623375, 4141000, 5797400, 7246750, 14493500, 28987000]

約数ペア:

[(1, 28987000), (2, 14493500), (4, 7246750), (5, 5797400), (7, 4141000), (8, 3623375), (10, 2898700), (14, 2070500), (20, 1449350), (25, 1159480), (28, 1035250), (35, 828200), (40, 724675), (41, 707000), (50, 579740), (56, 517625), (70, 414100), (82, 353500), (100, 289870), (101, 287000), (125, 231896), (140, 207050), (164, 176750), (175, 165640), (200, 144935), (202, 143500), (205, 141400), (250, 115948), (280, 103525), (287, 101000), (328, 88375), (350, 82820), (404, 71750), (410, 70700), (500, 57974), (505, 57400), (574, 50500), (700, 41410), (707, 41000), (808, 35875), (820, 35350), (875, 33128), (1000, 28987), (1010, 28700), (1025, 28280), (1148, 25250), (1400, 20705), (1414, 20500), (1435, 20200), (1640, 17675), (1750, 16564), (2020, 14350), (2050, 14140), (2296, 12625), (2525, 11480), (2828, 10250), (2870, 10100), (3500, 8282), (3535, 8200), (4040, 7175), (4100, 7070), (4141, 7000), (5050, 5740), (5125, 5656)]