21107877

素因数分解:

$3^1\times 7^3\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:378

約数の個数: 32

約数和(自身を含む): 33388800

約数和(自身を除く): 12280923

約数列:

[1, 3, 7, 21, 49, 73, 147, 219, 281, 343, 511, 843, 1029, 1533, 1967, 3577, 5901, 10731, 13769, 20513, 25039, 41307, 61539, 75117, 96383, 143591, 289149, 430773, 1005137, 3015411, 7035959, 21107877]

約数ペア:

[(1, 21107877), (3, 7035959), (7, 3015411), (21, 1005137), (49, 430773), (73, 289149), (147, 143591), (219, 96383), (281, 75117), (343, 61539), (511, 41307), (843, 25039), (1029, 20513), (1533, 13769), (1967, 10731), (3577, 5901)]