20658321

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:223

約数の個数: 40

約数和(自身を含む): 32498664

約数和(自身を除く): 11840343

約数列:

[1, 3, 9, 27, 37, 61, 81, 111, 113, 183, 333, 339, 549, 999, 1017, 1647, 2257, 2997, 3051, 4181, 4941, 6771, 6893, 9153, 12543, 20313, 20679, 37629, 60939, 62037, 112887, 182817, 186111, 255041, 338661, 558333, 765123, 2295369, 6886107, 20658321]

約数ペア:

[(1, 20658321), (3, 6886107), (9, 2295369), (27, 765123), (37, 558333), (61, 338661), (81, 255041), (111, 186111), (113, 182817), (183, 112887), (333, 62037), (339, 60939), (549, 37629), (999, 20679), (1017, 20313), (1647, 12543), (2257, 9153), (2997, 6893), (3051, 6771), (4181, 4941)]