21123687

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{983}}^1$

素因数の和:1047

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 11938713

約数列:

[1, 3, 13, 19, 29, 39, 57, 87, 247, 377, 551, 741, 983, 1131, 1653, 2949, 7163, 12779, 18677, 21489, 28507, 38337, 56031, 85521, 242801, 370591, 541633, 728403, 1111773, 1624899, 7041229, 21123687]

約数ペア:

[(1, 21123687), (3, 7041229), (13, 1624899), (19, 1111773), (29, 728403), (39, 541633), (57, 370591), (87, 242801), (247, 85521), (377, 56031), (551, 38337), (741, 28507), (983, 21489), (1131, 18677), (1653, 12779), (2949, 7163)]