19666816

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:303

約数の個数: 64

約数和(自身を含む): 43182720

約数和(自身を除く): 23515904

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 53, 64, 104, 106, 128, 208, 212, 223, 416, 424, 446, 689, 832, 848, 892, 1378, 1664, 1696, 1784, 2756, 2899, 3392, 3568, 5512, 5798, 6784, 7136, 11024, 11596, 11819, 14272, 22048, 23192, 23638, 28544, 44096, 46384, 47276, 88192, 92768, 94552, 153647, 185536, 189104, 307294, 371072, 378208, 614588, 756416, 1229176, 1512832, 2458352, 4916704, 9833408, 19666816]

約数ペア:

[(1, 19666816), (2, 9833408), (4, 4916704), (8, 2458352), (13, 1512832), (16, 1229176), (26, 756416), (32, 614588), (52, 378208), (53, 371072), (64, 307294), (104, 189104), (106, 185536), (128, 153647), (208, 94552), (212, 92768), (223, 88192), (416, 47276), (424, 46384), (446, 44096), (689, 28544), (832, 23638), (848, 23192), (892, 22048), (1378, 14272), (1664, 11819), (1696, 11596), (1784, 11024), (2756, 7136), (2899, 6784), (3392, 5798), (3568, 5512)]