1640390000

素因数分解:

$2^4\times 5^4\times {\mathrm{164039}}^1$

素因数の和:164067

約数の個数: 50

約数和(自身を含む): 3971572440

約数和(自身を除く): 2331182440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 10000, 164039, 328078, 656156, 820195, 1312312, 1640390, 2624624, 3280780, 4100975, 6561560, 8201950, 13123120, 16403900, 20504875, 32807800, 41009750, 65615600, 82019500, 102524375, 164039000, 205048750, 328078000, 410097500, 820195000, 1640390000]

約数ペア:

[(1, 1640390000), (2, 820195000), (4, 410097500), (5, 328078000), (8, 205048750), (10, 164039000), (16, 102524375), (20, 82019500), (25, 65615600), (40, 41009750), (50, 32807800), (80, 20504875), (100, 16403900), (125, 13123120), (200, 8201950), (250, 6561560), (400, 4100975), (500, 3280780), (625, 2624624), (1000, 1640390), (1250, 1312312), (2000, 820195), (2500, 656156), (5000, 328078), (10000, 164039)]