31256240

素因数分解:

$2^4\times 5^1\times {\mathrm{390703}}^1$

素因数の和:390716

約数の個数: 20

約数和(自身を含む): 72670944

約数和(自身を除く): 41414704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390703, 781406, 1562812, 1953515, 3125624, 3907030, 6251248, 7814060, 15628120, 31256240]

約数ペア:

[(1, 31256240), (2, 15628120), (4, 7814060), (5, 6251248), (8, 3907030), (10, 3125624), (16, 1953515), (20, 1562812), (40, 781406), (80, 390703)]