20525840

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:216

約数の個数: 80

約数和(自身を含む): 50139648

約数和(自身を除く): 29613808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 53, 80, 94, 103, 106, 188, 206, 212, 235, 265, 376, 412, 424, 470, 515, 530, 752, 824, 848, 940, 1030, 1060, 1648, 1880, 2060, 2120, 2491, 3760, 4120, 4240, 4841, 4982, 5459, 8240, 9682, 9964, 10918, 12455, 19364, 19928, 21836, 24205, 24910, 27295, 38728, 39856, 43672, 48410, 49820, 54590, 77456, 87344, 96820, 99640, 109180, 193640, 199280, 218360, 256573, 387280, 436720, 513146, 1026292, 1282865, 2052584, 2565730, 4105168, 5131460, 10262920, 20525840]

約数ペア:

[(1, 20525840), (2, 10262920), (4, 5131460), (5, 4105168), (8, 2565730), (10, 2052584), (16, 1282865), (20, 1026292), (40, 513146), (47, 436720), (53, 387280), (80, 256573), (94, 218360), (103, 199280), (106, 193640), (188, 109180), (206, 99640), (212, 96820), (235, 87344), (265, 77456), (376, 54590), (412, 49820), (424, 48410), (470, 43672), (515, 39856), (530, 38728), (752, 27295), (824, 24910), (848, 24205), (940, 21836), (1030, 19928), (1060, 19364), (1648, 12455), (1880, 10918), (2060, 9964), (2120, 9682), (2491, 8240), (3760, 5459), (4120, 4982), (4240, 4841)]