1550000

素因数分解:

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

素因数の和:64

約数の個数: 60

約数和(自身を含む): 3874752

約数和(自身を除く): 2324752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 125, 155, 200, 248, 250, 310, 400, 496, 500, 620, 625, 775, 1000, 1240, 1250, 1550, 2000, 2480, 2500, 3100, 3125, 3875, 5000, 6200, 6250, 7750, 10000, 12400, 12500, 15500, 19375, 25000, 31000, 38750, 50000, 62000, 77500, 96875, 155000, 193750, 310000, 387500, 775000, 1550000]

約数ペア:

[(1, 1550000), (2, 775000), (4, 387500), (5, 310000), (8, 193750), (10, 155000), (16, 96875), (20, 77500), (25, 62000), (31, 50000), (40, 38750), (50, 31000), (62, 25000), (80, 19375), (100, 15500), (124, 12500), (125, 12400), (155, 10000), (200, 7750), (248, 6250), (250, 6200), (310, 5000), (400, 3875), (496, 3125), (500, 3100), (620, 2500), (625, 2480), (775, 2000), (1000, 1550), (1240, 1250)]