20972637

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2503}}^1$

素因数の和:2542

約数の個数: 36

約数和(自身を含む): 37109280

約数和(自身を除く): 16136643

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2503, 2793, 7509, 8379, 17521, 22527, 47557, 52563, 122647, 142671, 157689, 332899, 367941, 428013, 998697, 1103823, 2330293, 2996091, 6990879, 20972637]

約数ペア:

[(1, 20972637), (3, 6990879), (7, 2996091), (9, 2330293), (19, 1103823), (21, 998697), (49, 428013), (57, 367941), (63, 332899), (133, 157689), (147, 142671), (171, 122647), (399, 52563), (441, 47557), (931, 22527), (1197, 17521), (2503, 8379), (2793, 7509)]