256051240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{148867}}^1$

素因数の和:148921

約数の個数: 32

約数和(自身を含む): 589517280

約数和(自身を除く): 333466040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 148867, 297734, 595468, 744335, 1190936, 1488670, 2977340, 5954680, 6401281, 12802562, 25605124, 32006405, 51210248, 64012810, 128025620, 256051240]

約数ペア:

[(1, 256051240), (2, 128025620), (4, 64012810), (5, 51210248), (8, 32006405), (10, 25605124), (20, 12802562), (40, 6401281), (43, 5954680), (86, 2977340), (172, 1488670), (215, 1190936), (344, 744335), (430, 595468), (860, 297734), (1720, 148867)]