21120666

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{19}}^2\times {\mathrm{199}}^1$

素因数の和:256

約数の個数: 72

約数和(自身を含む): 52120800

約数和(自身を除く): 31000134

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 49, 57, 98, 114, 133, 147, 199, 266, 294, 361, 398, 399, 597, 722, 798, 931, 1083, 1194, 1393, 1862, 2166, 2527, 2786, 2793, 3781, 4179, 5054, 5586, 7562, 7581, 8358, 9751, 11343, 15162, 17689, 19502, 22686, 26467, 29253, 35378, 52934, 53067, 58506, 71839, 79401, 106134, 143678, 158802, 185269, 215517, 370538, 431034, 502873, 555807, 1005746, 1111614, 1508619, 3017238, 3520111, 7040222, 10560333, 21120666]

約数ペア:

[(1, 21120666), (2, 10560333), (3, 7040222), (6, 3520111), (7, 3017238), (14, 1508619), (19, 1111614), (21, 1005746), (38, 555807), (42, 502873), (49, 431034), (57, 370538), (98, 215517), (114, 185269), (133, 158802), (147, 143678), (199, 106134), (266, 79401), (294, 71839), (361, 58506), (398, 53067), (399, 52934), (597, 35378), (722, 29253), (798, 26467), (931, 22686), (1083, 19502), (1194, 17689), (1393, 15162), (1862, 11343), (2166, 9751), (2527, 8358), (2786, 7581), (2793, 7562), (3781, 5586), (4179, 5054)]