19964464

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1811}}^1$

素因数の和:1885

約数の個数: 40

約数和(自身を含む): 42466032

約数和(自身を除く): 22501568

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1811, 2756, 3622, 5512, 7244, 11024, 14488, 23543, 28976, 47086, 94172, 95983, 188344, 191966, 376688, 383932, 767864, 1247779, 1535728, 2495558, 4991116, 9982232, 19964464]

約数ペア:

[(1, 19964464), (2, 9982232), (4, 4991116), (8, 2495558), (13, 1535728), (16, 1247779), (26, 767864), (52, 383932), (53, 376688), (104, 191966), (106, 188344), (208, 95983), (212, 94172), (424, 47086), (689, 28976), (848, 23543), (1378, 14488), (1811, 11024), (2756, 7244), (3622, 5512)]