21665940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1373}}^1$

素因数の和:1648

約数の個数: 48

約数和(自身を含む): 60939648

約数和(自身を除く): 39273708

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 263, 526, 789, 1052, 1315, 1373, 1578, 2630, 2746, 3156, 3945, 4119, 5260, 5492, 6865, 7890, 8238, 13730, 15780, 16476, 20595, 27460, 41190, 82380, 361099, 722198, 1083297, 1444396, 1805495, 2166594, 3610990, 4333188, 5416485, 7221980, 10832970, 21665940]

約数ペア:

[(1, 21665940), (2, 10832970), (3, 7221980), (4, 5416485), (5, 4333188), (6, 3610990), (10, 2166594), (12, 1805495), (15, 1444396), (20, 1083297), (30, 722198), (60, 361099), (263, 82380), (526, 41190), (789, 27460), (1052, 20595), (1315, 16476), (1373, 15780), (1578, 13730), (2630, 8238), (2746, 7890), (3156, 6865), (3945, 5492), (4119, 5260)]