20789560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1277}}^1$

素因数の和:1336

約数の個数: 64

約数和(自身を含む): 52449120

約数和(自身を除く): 31659560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1277, 1480, 1628, 2035, 2554, 3256, 4070, 5108, 6385, 8140, 10216, 12770, 14047, 16280, 25540, 28094, 47249, 51080, 56188, 70235, 94498, 112376, 140470, 188996, 236245, 280940, 377992, 472490, 519739, 561880, 944980, 1039478, 1889960, 2078956, 2598695, 4157912, 5197390, 10394780, 20789560]

約数ペア:

[(1, 20789560), (2, 10394780), (4, 5197390), (5, 4157912), (8, 2598695), (10, 2078956), (11, 1889960), (20, 1039478), (22, 944980), (37, 561880), (40, 519739), (44, 472490), (55, 377992), (74, 280940), (88, 236245), (110, 188996), (148, 140470), (185, 112376), (220, 94498), (296, 70235), (370, 56188), (407, 51080), (440, 47249), (740, 28094), (814, 25540), (1277, 16280), (1480, 14047), (1628, 12770), (2035, 10216), (2554, 8140), (3256, 6385), (4070, 5108)]