21303856

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:266

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 29692880

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 67, 68, 112, 119, 134, 136, 167, 238, 268, 272, 334, 469, 476, 536, 668, 938, 952, 1072, 1139, 1169, 1336, 1876, 1904, 2278, 2338, 2672, 2839, 3752, 4556, 4676, 5678, 7504, 7973, 9112, 9352, 11189, 11356, 15946, 18224, 18704, 19873, 22378, 22712, 31892, 39746, 44756, 45424, 63784, 78323, 79492, 89512, 127568, 156646, 158984, 179024, 190213, 313292, 317968, 380426, 626584, 760852, 1253168, 1331491, 1521704, 2662982, 3043408, 5325964, 10651928, 21303856]

約数ペア:

[(1, 21303856), (2, 10651928), (4, 5325964), (7, 3043408), (8, 2662982), (14, 1521704), (16, 1331491), (17, 1253168), (28, 760852), (34, 626584), (56, 380426), (67, 317968), (68, 313292), (112, 190213), (119, 179024), (134, 158984), (136, 156646), (167, 127568), (238, 89512), (268, 79492), (272, 78323), (334, 63784), (469, 45424), (476, 44756), (536, 39746), (668, 31892), (938, 22712), (952, 22378), (1072, 19873), (1139, 18704), (1169, 18224), (1336, 15946), (1876, 11356), (1904, 11189), (2278, 9352), (2338, 9112), (2672, 7973), (2839, 7504), (3752, 5678), (4556, 4676)]