28055000

素因数分解:

$2^3\times 5^4\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:238

約数の個数: 80

約数和(自身を含む): 68228160

約数和(自身を除く): 40173160

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 155, 181, 200, 248, 250, 310, 362, 500, 620, 625, 724, 775, 905, 1000, 1240, 1250, 1448, 1550, 1810, 2500, 3100, 3620, 3875, 4525, 5000, 5611, 6200, 7240, 7750, 9050, 11222, 15500, 18100, 19375, 22444, 22625, 28055, 31000, 36200, 38750, 44888, 45250, 56110, 77500, 90500, 112220, 113125, 140275, 155000, 181000, 224440, 226250, 280550, 452500, 561100, 701375, 905000, 1122200, 1402750, 2805500, 3506875, 5611000, 7013750, 14027500, 28055000]

約数ペア:

[(1, 28055000), (2, 14027500), (4, 7013750), (5, 5611000), (8, 3506875), (10, 2805500), (20, 1402750), (25, 1122200), (31, 905000), (40, 701375), (50, 561100), (62, 452500), (100, 280550), (124, 226250), (125, 224440), (155, 181000), (181, 155000), (200, 140275), (248, 113125), (250, 112220), (310, 90500), (362, 77500), (500, 56110), (620, 45250), (625, 44888), (724, 38750), (775, 36200), (905, 31000), (1000, 28055), (1240, 22625), (1250, 22444), (1448, 19375), (1550, 18100), (1810, 15500), (2500, 11222), (3100, 9050), (3620, 7750), (3875, 7240), (4525, 6200), (5000, 5611)]