20253688

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:716

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 27646472

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 43, 52, 56, 86, 91, 104, 172, 182, 301, 344, 364, 559, 602, 647, 728, 1118, 1204, 1294, 2236, 2408, 2588, 3913, 4472, 4529, 5176, 7826, 8411, 9058, 15652, 16822, 18116, 27821, 31304, 33644, 36232, 55642, 58877, 67288, 111284, 117754, 194747, 222568, 235508, 361673, 389494, 471016, 723346, 778988, 1446692, 1557976, 2531711, 2893384, 5063422, 10126844, 20253688]

約数ペア:

[(1, 20253688), (2, 10126844), (4, 5063422), (7, 2893384), (8, 2531711), (13, 1557976), (14, 1446692), (26, 778988), (28, 723346), (43, 471016), (52, 389494), (56, 361673), (86, 235508), (91, 222568), (104, 194747), (172, 117754), (182, 111284), (301, 67288), (344, 58877), (364, 55642), (559, 36232), (602, 33644), (647, 31304), (728, 27821), (1118, 18116), (1204, 16822), (1294, 15652), (2236, 9058), (2408, 8411), (2588, 7826), (3913, 5176), (4472, 4529)]