20509628

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{257}}^1\times {\mathrm{281}}^1$

素因数の和:613

約数の個数: 24

約数和(自身を含む): 36669024

約数和(自身を除く): 16159396

約数列:

[1, 2, 4, 71, 142, 257, 281, 284, 514, 562, 1028, 1124, 18247, 19951, 36494, 39902, 72217, 72988, 79804, 144434, 288868, 5127407, 10254814, 20509628]

約数ペア:

[(1, 20509628), (2, 10254814), (4, 5127407), (71, 288868), (142, 144434), (257, 79804), (281, 72988), (284, 72217), (514, 39902), (562, 36494), (1028, 19951), (1124, 18247)]