2154500

素因数分解:

$2^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:189

約数の個数: 48

約数和(自身を含む): 4892160

約数和(自身を除く): 2737660

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 139, 155, 250, 278, 310, 500, 556, 620, 695, 775, 1390, 1550, 2780, 3100, 3475, 3875, 4309, 6950, 7750, 8618, 13900, 15500, 17236, 17375, 21545, 34750, 43090, 69500, 86180, 107725, 215450, 430900, 538625, 1077250, 2154500]

約数ペア:

[(1, 2154500), (2, 1077250), (4, 538625), (5, 430900), (10, 215450), (20, 107725), (25, 86180), (31, 69500), (50, 43090), (62, 34750), (100, 21545), (124, 17375), (125, 17236), (139, 15500), (155, 13900), (250, 8618), (278, 7750), (310, 6950), (500, 4309), (556, 3875), (620, 3475), (695, 3100), (775, 2780), (1390, 1550)]