638189396

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{613}}^1\times {\mathrm{20021}}^1$

素因数の和:20651

約数の個数: 24

約数和(自身を含む): 1204763784

約数和(自身を除く): 566574388

約数列:

[1, 2, 4, 13, 26, 52, 613, 1226, 2452, 7969, 15938, 20021, 31876, 40042, 80084, 260273, 520546, 1041092, 12272873, 24545746, 49091492, 159547349, 319094698, 638189396]

約数ペア:

[(1, 638189396), (2, 319094698), (4, 159547349), (13, 49091492), (26, 24545746), (52, 12272873), (613, 1041092), (1226, 520546), (2452, 260273), (7969, 80084), (15938, 40042), (20021, 31876)]