21344240

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{557}}^1$

素因数の和:1049

約数の個数: 40

約数和(自身を含む): 49818240

約数和(自身を除く): 28474000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 557, 958, 1114, 1916, 2228, 2395, 2785, 3832, 4456, 4790, 5570, 7664, 8912, 9580, 11140, 19160, 22280, 38320, 44560, 266803, 533606, 1067212, 1334015, 2134424, 2668030, 4268848, 5336060, 10672120, 21344240]

約数ペア:

[(1, 21344240), (2, 10672120), (4, 5336060), (5, 4268848), (8, 2668030), (10, 2134424), (16, 1334015), (20, 1067212), (40, 533606), (80, 266803), (479, 44560), (557, 38320), (958, 22280), (1114, 19160), (1916, 11140), (2228, 9580), (2395, 8912), (2785, 7664), (3832, 5570), (4456, 4790)]