81554525

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{509}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 119523600

約数和(自身を除く): 37969075

約数列:

[1, 5, 13, 17, 25, 29, 65, 85, 145, 221, 325, 377, 425, 493, 509, 725, 1105, 1885, 2465, 2545, 5525, 6409, 6617, 8653, 9425, 12325, 12725, 14761, 32045, 33085, 43265, 73805, 112489, 160225, 165425, 191893, 216325, 250937, 369025, 562445, 959465, 1254685, 2812225, 3262181, 4797325, 6273425, 16310905, 81554525]

約数ペア:

[(1, 81554525), (5, 16310905), (13, 6273425), (17, 4797325), (25, 3262181), (29, 2812225), (65, 1254685), (85, 959465), (145, 562445), (221, 369025), (325, 250937), (377, 216325), (425, 191893), (493, 165425), (509, 160225), (725, 112489), (1105, 73805), (1885, 43265), (2465, 33085), (2545, 32045), (5525, 14761), (6409, 12725), (6617, 12325), (8653, 9425)]