20919980

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5779}}^1$

素因数の和:5969

約数の個数: 24

約数和(自身を含む): 44182320

約数和(自身を除く): 23262340

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5779, 11558, 23116, 28895, 57790, 115580, 1045999, 2091998, 4183996, 5229995, 10459990, 20919980]

約数ペア:

[(1, 20919980), (2, 10459990), (4, 5229995), (5, 4183996), (10, 2091998), (20, 1045999), (181, 115580), (362, 57790), (724, 28895), (905, 23116), (1810, 11558), (3620, 5779)]