20900572

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 47667200

約数和(自身を除く): 26766628

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 31, 44, 62, 77, 121, 124, 154, 199, 217, 242, 308, 341, 398, 434, 484, 682, 796, 847, 868, 1364, 1393, 1694, 2189, 2387, 2786, 3388, 3751, 4378, 4774, 5572, 6169, 7502, 8756, 9548, 12338, 15004, 15323, 24079, 24676, 26257, 30646, 43183, 48158, 52514, 61292, 67859, 86366, 96316, 105028, 135718, 168553, 172732, 271436, 337106, 475013, 674212, 746449, 950026, 1492898, 1900052, 2985796, 5225143, 10450286, 20900572]

約数ペア:

[(1, 20900572), (2, 10450286), (4, 5225143), (7, 2985796), (11, 1900052), (14, 1492898), (22, 950026), (28, 746449), (31, 674212), (44, 475013), (62, 337106), (77, 271436), (121, 172732), (124, 168553), (154, 135718), (199, 105028), (217, 96316), (242, 86366), (308, 67859), (341, 61292), (398, 52514), (434, 48158), (484, 43183), (682, 30646), (796, 26257), (847, 24676), (868, 24079), (1364, 15323), (1393, 15004), (1694, 12338), (2189, 9548), (2387, 8756), (2786, 7502), (3388, 6169), (3751, 5572), (4378, 4774)]