2788120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1621}}^1$

素因数の和:1675

約数の個数: 32

約数和(自身を含む): 6423120

約数和(自身を除く): 3635000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1621, 1720, 3242, 6484, 8105, 12968, 16210, 32420, 64840, 69703, 139406, 278812, 348515, 557624, 697030, 1394060, 2788120]

約数ペア:

[(1, 2788120), (2, 1394060), (4, 697030), (5, 557624), (8, 348515), (10, 278812), (20, 139406), (40, 69703), (43, 64840), (86, 32420), (172, 16210), (215, 12968), (344, 8105), (430, 6484), (860, 3242), (1621, 1720)]