19890120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{1997}}^1$

素因数の和:2094

約数の個数: 64

約数和(自身を含む): 60419520

約数和(自身を除く): 40529400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 83, 120, 166, 249, 332, 415, 498, 664, 830, 996, 1245, 1660, 1992, 1997, 2490, 3320, 3994, 4980, 5991, 7988, 9960, 9985, 11982, 15976, 19970, 23964, 29955, 39940, 47928, 59910, 79880, 119820, 165751, 239640, 331502, 497253, 663004, 828755, 994506, 1326008, 1657510, 1989012, 2486265, 3315020, 3978024, 4972530, 6630040, 9945060, 19890120]

約数ペア:

[(1, 19890120), (2, 9945060), (3, 6630040), (4, 4972530), (5, 3978024), (6, 3315020), (8, 2486265), (10, 1989012), (12, 1657510), (15, 1326008), (20, 994506), (24, 828755), (30, 663004), (40, 497253), (60, 331502), (83, 239640), (120, 165751), (166, 119820), (249, 79880), (332, 59910), (415, 47928), (498, 39940), (664, 29955), (830, 23964), (996, 19970), (1245, 15976), (1660, 11982), (1992, 9985), (1997, 9960), (2490, 7988), (3320, 5991), (3994, 4980)]