20439860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20857}}^1$

素因数の和:20880

約数の個数: 36

約数和(自身を含む): 49934052

約数和(自身を除く): 29494192

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20857, 41714, 83428, 104285, 145999, 208570, 291998, 417140, 583996, 729995, 1021993, 1459990, 2043986, 2919980, 4087972, 5109965, 10219930, 20439860]

約数ペア:

[(1, 20439860), (2, 10219930), (4, 5109965), (5, 4087972), (7, 2919980), (10, 2043986), (14, 1459990), (20, 1021993), (28, 729995), (35, 583996), (49, 417140), (70, 291998), (98, 208570), (140, 145999), (196, 104285), (245, 83428), (490, 41714), (980, 20857)]