21646947

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{227}}^1\times {\mathrm{239}}^1$

素因数の和:495

約数の個数: 32

約数和(自身を含む): 35020800

約数和(自身を除く): 13373853

約数列:

[1, 3, 7, 19, 21, 57, 133, 227, 239, 399, 681, 717, 1589, 1673, 4313, 4541, 4767, 5019, 12939, 13623, 30191, 31787, 54253, 90573, 95361, 162759, 379771, 1030807, 1139313, 3092421, 7215649, 21646947]

約数ペア:

[(1, 21646947), (3, 7215649), (7, 3092421), (19, 1139313), (21, 1030807), (57, 379771), (133, 162759), (227, 95361), (239, 90573), (399, 54253), (681, 31787), (717, 30191), (1589, 13623), (1673, 12939), (4313, 5019), (4541, 4767)]