19810984

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:218

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 22213976

約数列:

[1, 2, 4, 8, 17, 31, 34, 37, 62, 68, 74, 124, 127, 136, 148, 248, 254, 296, 508, 527, 629, 1016, 1054, 1147, 1258, 2108, 2159, 2294, 2516, 3937, 4216, 4318, 4588, 4699, 5032, 7874, 8636, 9176, 9398, 15748, 17272, 18796, 19499, 31496, 37592, 38998, 66929, 77996, 79883, 133858, 145669, 155992, 159766, 267716, 291338, 319532, 535432, 582676, 639064, 1165352, 2476373, 4952746, 9905492, 19810984]

約数ペア:

[(1, 19810984), (2, 9905492), (4, 4952746), (8, 2476373), (17, 1165352), (31, 639064), (34, 582676), (37, 535432), (62, 319532), (68, 291338), (74, 267716), (124, 159766), (127, 155992), (136, 145669), (148, 133858), (248, 79883), (254, 77996), (296, 66929), (508, 38998), (527, 37592), (629, 31496), (1016, 19499), (1054, 18796), (1147, 17272), (1258, 15748), (2108, 9398), (2159, 9176), (2294, 8636), (2516, 7874), (3937, 5032), (4216, 4699), (4318, 4588)]