20157840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{27997}}^1$

素因数の和:28016

約数の個数: 60

約数和(自身を含む): 67699164

約数和(自身を除く): 47541324

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 27997, 55994, 83991, 111988, 139985, 167982, 223976, 251973, 279970, 335964, 419955, 447952, 503946, 559940, 671928, 839910, 1007892, 1119880, 1259865, 1343856, 1679820, 2015784, 2239760, 2519730, 3359640, 4031568, 5039460, 6719280, 10078920, 20157840]

約数ペア:

[(1, 20157840), (2, 10078920), (3, 6719280), (4, 5039460), (5, 4031568), (6, 3359640), (8, 2519730), (9, 2239760), (10, 2015784), (12, 1679820), (15, 1343856), (16, 1259865), (18, 1119880), (20, 1007892), (24, 839910), (30, 671928), (36, 559940), (40, 503946), (45, 447952), (48, 419955), (60, 335964), (72, 279970), (80, 251973), (90, 223976), (120, 167982), (144, 139985), (180, 111988), (240, 83991), (360, 55994), (720, 27997)]