20900970

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{389}}^1$

素因数の和:604

約数の個数: 64

約数和(自身を含む): 56160000

約数和(自身を除く): 35259030

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 199, 270, 389, 398, 597, 778, 995, 1167, 1194, 1791, 1945, 1990, 2334, 2985, 3501, 3582, 3890, 5373, 5835, 5970, 7002, 8955, 10503, 10746, 11670, 17505, 17910, 21006, 26865, 35010, 52515, 53730, 77411, 105030, 154822, 232233, 387055, 464466, 696699, 774110, 1161165, 1393398, 2090097, 2322330, 3483495, 4180194, 6966990, 10450485, 20900970]

約数ペア:

[(1, 20900970), (2, 10450485), (3, 6966990), (5, 4180194), (6, 3483495), (9, 2322330), (10, 2090097), (15, 1393398), (18, 1161165), (27, 774110), (30, 696699), (45, 464466), (54, 387055), (90, 232233), (135, 154822), (199, 105030), (270, 77411), (389, 53730), (398, 52515), (597, 35010), (778, 26865), (995, 21006), (1167, 17910), (1194, 17505), (1791, 11670), (1945, 10746), (1990, 10503), (2334, 8955), (2985, 7002), (3501, 5970), (3582, 5835), (3890, 5373)]