20836985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 28939680

約数和(自身を除く): 8102695

約数列:

[1, 5, 13, 17, 65, 85, 109, 173, 221, 545, 865, 1105, 1417, 1853, 2249, 2941, 7085, 9265, 11245, 14705, 18857, 24089, 38233, 94285, 120445, 191165, 245141, 320569, 1225705, 1602845, 4167397, 20836985]

約数ペア:

[(1, 20836985), (5, 4167397), (13, 1602845), (17, 1225705), (65, 320569), (85, 245141), (109, 191165), (173, 120445), (221, 94285), (545, 38233), (865, 24089), (1105, 18857), (1417, 14705), (1853, 11245), (2249, 9265), (2941, 7085)]