128696820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{306421}}^1$

素因数の和:306440

約数の個数: 48

約数和(自身を含む): 411831168

約数和(自身を除く): 283134348

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 306421, 612842, 919263, 1225684, 1532105, 1838526, 2144947, 3064210, 3677052, 4289894, 4596315, 6128420, 6434841, 8579788, 9192630, 10724735, 12869682, 18385260, 21449470, 25739364, 32174205, 42898940, 64348410, 128696820]

約数ペア:

[(1, 128696820), (2, 64348410), (3, 42898940), (4, 32174205), (5, 25739364), (6, 21449470), (7, 18385260), (10, 12869682), (12, 10724735), (14, 9192630), (15, 8579788), (20, 6434841), (21, 6128420), (28, 4596315), (30, 4289894), (35, 3677052), (42, 3064210), (60, 2144947), (70, 1838526), (84, 1532105), (105, 1225684), (140, 919263), (210, 612842), (420, 306421)]