20040904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1471}}^1$

素因数の和:1621

約数の個数: 32

約数和(自身を含む): 40803840

約数和(自身を除く): 20762936

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 131, 262, 524, 1048, 1471, 1703, 2942, 3406, 5884, 6812, 11768, 13624, 19123, 38246, 76492, 152984, 192701, 385402, 770804, 1541608, 2505113, 5010226, 10020452, 20040904]

約数ペア:

[(1, 20040904), (2, 10020452), (4, 5010226), (8, 2505113), (13, 1541608), (26, 770804), (52, 385402), (104, 192701), (131, 152984), (262, 76492), (524, 38246), (1048, 19123), (1471, 13624), (1703, 11768), (2942, 6812), (3406, 5884)]