81798400

素因数分解:

$2^8\times 5^2\times {\mathrm{12781}}^1$

素因数の和:12807

約数の個数: 54

約数和(自身を含む): 202479662

約数和(自身を除く): 120681262

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 640, 800, 1280, 1600, 3200, 6400, 12781, 25562, 51124, 63905, 102248, 127810, 204496, 255620, 319525, 408992, 511240, 639050, 817984, 1022480, 1278100, 1635968, 2044960, 2556200, 3271936, 4089920, 5112400, 8179840, 10224800, 16359680, 20449600, 40899200, 81798400]

約数ペア:

[(1, 81798400), (2, 40899200), (4, 20449600), (5, 16359680), (8, 10224800), (10, 8179840), (16, 5112400), (20, 4089920), (25, 3271936), (32, 2556200), (40, 2044960), (50, 1635968), (64, 1278100), (80, 1022480), (100, 817984), (128, 639050), (160, 511240), (200, 408992), (256, 319525), (320, 255620), (400, 204496), (640, 127810), (800, 102248), (1280, 63905), (1600, 51124), (3200, 25562), (6400, 12781)]