21987788

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{15227}}^1$

素因数の和:15269

約数の個数: 18

約数和(自身を含む): 40613076

約数和(自身を除く): 18625288

約数列:

[1, 2, 4, 19, 38, 76, 361, 722, 1444, 15227, 30454, 60908, 289313, 578626, 1157252, 5496947, 10993894, 21987788]

約数ペア:

[(1, 21987788), (2, 10993894), (4, 5496947), (19, 1157252), (38, 578626), (76, 289313), (361, 60908), (722, 30454), (1444, 15227)]