21087760

素因数分解:

$2^4\times 5^1\times {\mathrm{263597}}^1$

素因数の和:263610

約数の個数: 20

約数和(自身を含む): 49029228

約数和(自身を除く): 27941468

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263597, 527194, 1054388, 1317985, 2108776, 2635970, 4217552, 5271940, 10543880, 21087760]

約数ペア:

[(1, 21087760), (2, 10543880), (4, 5271940), (5, 4217552), (8, 2635970), (10, 2108776), (16, 1317985), (20, 1054388), (40, 527194), (80, 263597)]