21178208

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{577}}^1$

素因数の和:655

約数の個数: 48

約数和(自身を含む): 44279424

約数和(自身を除く): 23101216

約数列:

[1, 2, 4, 8, 16, 31, 32, 37, 62, 74, 124, 148, 248, 296, 496, 577, 592, 992, 1147, 1154, 1184, 2294, 2308, 4588, 4616, 9176, 9232, 17887, 18352, 18464, 21349, 35774, 36704, 42698, 71548, 85396, 143096, 170792, 286192, 341584, 572384, 661819, 683168, 1323638, 2647276, 5294552, 10589104, 21178208]

約数ペア:

[(1, 21178208), (2, 10589104), (4, 5294552), (8, 2647276), (16, 1323638), (31, 683168), (32, 661819), (37, 572384), (62, 341584), (74, 286192), (124, 170792), (148, 143096), (248, 85396), (296, 71548), (496, 42698), (577, 36704), (592, 35774), (992, 21349), (1147, 18464), (1154, 18352), (1184, 17887), (2294, 9232), (2308, 9176), (4588, 4616)]