19781168

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1583}}^1$

素因数の和:1673

約数の個数: 40

約数和(自身を含む): 42425856

約数和(自身を除く): 22644688

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 71, 88, 142, 176, 284, 568, 781, 1136, 1562, 1583, 3124, 3166, 6248, 6332, 12496, 12664, 17413, 25328, 34826, 69652, 112393, 139304, 224786, 278608, 449572, 899144, 1236323, 1798288, 2472646, 4945292, 9890584, 19781168]

約数ペア:

[(1, 19781168), (2, 9890584), (4, 4945292), (8, 2472646), (11, 1798288), (16, 1236323), (22, 899144), (44, 449572), (71, 278608), (88, 224786), (142, 139304), (176, 112393), (284, 69652), (568, 34826), (781, 25328), (1136, 17413), (1562, 12664), (1583, 12496), (3124, 6332), (3166, 6248)]