20864116

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^2$

素因数の和:141

約数の個数: 72

約数和(自身を含む): 47491584

約数和(自身を除く): 26627468

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 31, 43, 52, 62, 86, 91, 124, 172, 182, 217, 301, 364, 403, 434, 559, 602, 806, 868, 1118, 1204, 1333, 1612, 1849, 2236, 2666, 2821, 3698, 3913, 5332, 5642, 7396, 7826, 9331, 11284, 12943, 15652, 17329, 18662, 24037, 25886, 34658, 37324, 48074, 51772, 57319, 69316, 96148, 114638, 121303, 168259, 229276, 242606, 336518, 401233, 485212, 673036, 745147, 802466, 1490294, 1604932, 2980588, 5216029, 10432058, 20864116]

約数ペア:

[(1, 20864116), (2, 10432058), (4, 5216029), (7, 2980588), (13, 1604932), (14, 1490294), (26, 802466), (28, 745147), (31, 673036), (43, 485212), (52, 401233), (62, 336518), (86, 242606), (91, 229276), (124, 168259), (172, 121303), (182, 114638), (217, 96148), (301, 69316), (364, 57319), (403, 51772), (434, 48074), (559, 37324), (602, 34658), (806, 25886), (868, 24037), (1118, 18662), (1204, 17329), (1333, 15652), (1612, 12943), (1849, 11284), (2236, 9331), (2666, 7826), (2821, 7396), (3698, 5642), (3913, 5332)]