21388776

素因数分解:

$2^3\times 3^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:506

約数の個数: 64

約数和(自身を含む): 56160000

約数和(自身を除く): 34771224

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 29, 58, 79, 87, 116, 158, 174, 232, 237, 316, 348, 389, 474, 632, 696, 778, 948, 1167, 1556, 1896, 2291, 2334, 3112, 4582, 4668, 6873, 9164, 9336, 11281, 13746, 18328, 22562, 27492, 30731, 33843, 45124, 54984, 61462, 67686, 90248, 92193, 122924, 135372, 184386, 245848, 270744, 368772, 737544, 891199, 1782398, 2673597, 3564796, 5347194, 7129592, 10694388, 21388776]

約数ペア:

[(1, 21388776), (2, 10694388), (3, 7129592), (4, 5347194), (6, 3564796), (8, 2673597), (12, 1782398), (24, 891199), (29, 737544), (58, 368772), (79, 270744), (87, 245848), (116, 184386), (158, 135372), (174, 122924), (232, 92193), (237, 90248), (316, 67686), (348, 61462), (389, 54984), (474, 45124), (632, 33843), (696, 30731), (778, 27492), (948, 22562), (1167, 18328), (1556, 13746), (1896, 11281), (2291, 9336), (2334, 9164), (3112, 6873), (4582, 4668)]