21284913

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{389}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 32497920

約数和(自身を除く): 11213007

約数列:

[1, 3, 13, 23, 39, 61, 69, 183, 299, 389, 793, 897, 1167, 1403, 2379, 4209, 5057, 8947, 15171, 18239, 23729, 26841, 54717, 71187, 116311, 308477, 348933, 545767, 925431, 1637301, 7094971, 21284913]

約数ペア:

[(1, 21284913), (3, 7094971), (13, 1637301), (23, 925431), (39, 545767), (61, 348933), (69, 308477), (183, 116311), (299, 71187), (389, 54717), (793, 26841), (897, 23729), (1167, 18239), (1403, 15171), (2379, 8947), (4209, 5057)]