20657120

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^3\times {\mathrm{97}}^1$

素因数の和:145

約数の個数: 96

約数和(自身を含む): 54232416

約数和(自身を除く): 33575296

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 97, 110, 121, 160, 176, 194, 220, 242, 352, 388, 440, 484, 485, 605, 776, 880, 968, 970, 1067, 1210, 1331, 1552, 1760, 1936, 1940, 2134, 2420, 2662, 3104, 3872, 3880, 4268, 4840, 5324, 5335, 6655, 7760, 8536, 9680, 10648, 10670, 11737, 13310, 15520, 17072, 19360, 21296, 21340, 23474, 26620, 34144, 42592, 42680, 46948, 53240, 58685, 85360, 93896, 106480, 117370, 129107, 170720, 187792, 212960, 234740, 258214, 375584, 469480, 516428, 645535, 938960, 1032856, 1291070, 1877920, 2065712, 2582140, 4131424, 5164280, 10328560, 20657120]

約数ペア:

[(1, 20657120), (2, 10328560), (4, 5164280), (5, 4131424), (8, 2582140), (10, 2065712), (11, 1877920), (16, 1291070), (20, 1032856), (22, 938960), (32, 645535), (40, 516428), (44, 469480), (55, 375584), (80, 258214), (88, 234740), (97, 212960), (110, 187792), (121, 170720), (160, 129107), (176, 117370), (194, 106480), (220, 93896), (242, 85360), (352, 58685), (388, 53240), (440, 46948), (484, 42680), (485, 42592), (605, 34144), (776, 26620), (880, 23474), (968, 21340), (970, 21296), (1067, 19360), (1210, 17072), (1331, 15520), (1552, 13310), (1760, 11737), (1936, 10670), (1940, 10648), (2134, 9680), (2420, 8536), (2662, 7760), (3104, 6655), (3872, 5335), (3880, 5324), (4268, 4840)]