21380888

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{587}}^1$

素因数の和:779

約数の個数: 32

約数和(自身を含む): 41806800

約数和(自身を除く): 20425912

約数列:

[1, 2, 4, 8, 29, 58, 116, 157, 232, 314, 587, 628, 1174, 1256, 2348, 4553, 4696, 9106, 17023, 18212, 34046, 36424, 68092, 92159, 136184, 184318, 368636, 737272, 2672611, 5345222, 10690444, 21380888]

約数ペア:

[(1, 21380888), (2, 10690444), (4, 5345222), (8, 2672611), (29, 737272), (58, 368636), (116, 184318), (157, 136184), (232, 92159), (314, 68092), (587, 36424), (628, 34046), (1174, 18212), (1256, 17023), (2348, 9106), (4553, 4696)]