21439984

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{193}}^1$

素因数の和:385

約数の個数: 40

約数和(自身を含む): 42867792

約数和(自身を除く): 21427808

約数列:

[1, 2, 4, 8, 16, 53, 106, 131, 193, 212, 262, 386, 424, 524, 772, 848, 1048, 1544, 2096, 3088, 6943, 10229, 13886, 20458, 25283, 27772, 40916, 50566, 55544, 81832, 101132, 111088, 163664, 202264, 404528, 1339999, 2679998, 5359996, 10719992, 21439984]

約数ペア:

[(1, 21439984), (2, 10719992), (4, 5359996), (8, 2679998), (16, 1339999), (53, 404528), (106, 202264), (131, 163664), (193, 111088), (212, 101132), (262, 81832), (386, 55544), (424, 50566), (524, 40916), (772, 27772), (848, 25283), (1048, 20458), (1544, 13886), (2096, 10229), (3088, 6943)]