19800420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{331}}^1\times {\mathrm{997}}^1$

素因数の和:1340

約数の個数: 48

約数和(自身を含む): 55664448

約数和(自身を除く): 35864028

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 331, 662, 993, 997, 1324, 1655, 1986, 1994, 2991, 3310, 3972, 3988, 4965, 4985, 5982, 6620, 9930, 9970, 11964, 14955, 19860, 19940, 29910, 59820, 330007, 660014, 990021, 1320028, 1650035, 1980042, 3300070, 3960084, 4950105, 6600140, 9900210, 19800420]

約数ペア:

[(1, 19800420), (2, 9900210), (3, 6600140), (4, 4950105), (5, 3960084), (6, 3300070), (10, 1980042), (12, 1650035), (15, 1320028), (20, 990021), (30, 660014), (60, 330007), (331, 59820), (662, 29910), (993, 19940), (997, 19860), (1324, 14955), (1655, 11964), (1986, 9970), (1994, 9930), (2991, 6620), (3310, 5982), (3972, 4985), (3988, 4965)]