12940000

素因数分解:

$2^5\times 5^4\times {\mathrm{647}}^1$

素因数の和:677

約数の個数: 60

約数和(自身を含む): 31883544

約数和(自身を除く): 18943544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 647, 800, 1000, 1250, 1294, 2000, 2500, 2588, 3235, 4000, 5000, 5176, 6470, 10000, 10352, 12940, 16175, 20000, 20704, 25880, 32350, 51760, 64700, 80875, 103520, 129400, 161750, 258800, 323500, 404375, 517600, 647000, 808750, 1294000, 1617500, 2588000, 3235000, 6470000, 12940000]

約数ペア:

[(1, 12940000), (2, 6470000), (4, 3235000), (5, 2588000), (8, 1617500), (10, 1294000), (16, 808750), (20, 647000), (25, 517600), (32, 404375), (40, 323500), (50, 258800), (80, 161750), (100, 129400), (125, 103520), (160, 80875), (200, 64700), (250, 51760), (400, 32350), (500, 25880), (625, 20704), (647, 20000), (800, 16175), (1000, 12940), (1250, 10352), (1294, 10000), (2000, 6470), (2500, 5176), (2588, 5000), (3235, 4000)]