20984200

素因数分解:

$2^3\times 5^2\times {\mathrm{239}}^1\times {\mathrm{439}}^1$

素因数の和:694

約数の個数: 48

約数和(自身を含む): 49104000

約数和(自身を除く): 28119800

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 239, 439, 478, 878, 956, 1195, 1756, 1912, 2195, 2390, 3512, 4390, 4780, 5975, 8780, 9560, 10975, 11950, 17560, 21950, 23900, 43900, 47800, 87800, 104921, 209842, 419684, 524605, 839368, 1049210, 2098420, 2623025, 4196840, 5246050, 10492100, 20984200]

約数ペア:

[(1, 20984200), (2, 10492100), (4, 5246050), (5, 4196840), (8, 2623025), (10, 2098420), (20, 1049210), (25, 839368), (40, 524605), (50, 419684), (100, 209842), (200, 104921), (239, 87800), (439, 47800), (478, 43900), (878, 23900), (956, 21950), (1195, 17560), (1756, 11950), (1912, 10975), (2195, 9560), (2390, 8780), (3512, 5975), (4390, 4780)]