19782819

素因数分解:

$3^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{787}}^1$

素因数の和:829

約数の個数: 48

約数和(自身を含む): 35932800

約数和(自身を除く): 16149981

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 63, 133, 147, 171, 189, 399, 441, 513, 787, 931, 1197, 1323, 2361, 2793, 3591, 5509, 7083, 8379, 14953, 16527, 21249, 25137, 38563, 44859, 49581, 104671, 115689, 134577, 148743, 314013, 347067, 403731, 732697, 942039, 1041201, 2198091, 2826117, 6594273, 19782819]

約数ペア:

[(1, 19782819), (3, 6594273), (7, 2826117), (9, 2198091), (19, 1041201), (21, 942039), (27, 732697), (49, 403731), (57, 347067), (63, 314013), (133, 148743), (147, 134577), (171, 115689), (189, 104671), (399, 49581), (441, 44859), (513, 38563), (787, 25137), (931, 21249), (1197, 16527), (1323, 14953), (2361, 8379), (2793, 7083), (3591, 5509)]