21781330207

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{560551}}^1$

素因数の和:560639

約数の個数: 24

約数和(自身を含む): 27733870752

約数和(自身を除く): 5952540545

約数列:

[1, 7, 13, 49, 61, 91, 427, 637, 793, 2989, 5551, 38857, 560551, 3923857, 7287163, 27466999, 34193611, 51010141, 239355277, 357070987, 444516943, 1675486939, 3111618601, 21781330207]

約数ペア:

[(1, 21781330207), (7, 3111618601), (13, 1675486939), (49, 444516943), (61, 357070987), (91, 239355277), (427, 51010141), (637, 34193611), (793, 27466999), (2989, 7287163), (5551, 3923857), (38857, 560551)]