21254928

素因数分解:

$2^4\times 3^1\times {\mathrm{257}}^1\times {\mathrm{1723}}^1$

素因数の和:1991

約数の個数: 40

約数和(自身を含む): 55154208

約数和(自身を除く): 33899280

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 257, 514, 771, 1028, 1542, 1723, 2056, 3084, 3446, 4112, 5169, 6168, 6892, 10338, 12336, 13784, 20676, 27568, 41352, 82704, 442811, 885622, 1328433, 1771244, 2656866, 3542488, 5313732, 7084976, 10627464, 21254928]

約数ペア:

[(1, 21254928), (2, 10627464), (3, 7084976), (4, 5313732), (6, 3542488), (8, 2656866), (12, 1771244), (16, 1328433), (24, 885622), (48, 442811), (257, 82704), (514, 41352), (771, 27568), (1028, 20676), (1542, 13784), (1723, 12336), (2056, 10338), (3084, 6892), (3446, 6168), (4112, 5169)]