20718880

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1423}}^1$

素因数の和:1458

約数の個数: 96

約数和(自身を含む): 60286464

約数和(自身を除く): 39567584

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 364, 416, 455, 520, 560, 728, 910, 1040, 1120, 1423, 1456, 1820, 2080, 2846, 2912, 3640, 5692, 7115, 7280, 9961, 11384, 14230, 14560, 18499, 19922, 22768, 28460, 36998, 39844, 45536, 49805, 56920, 73996, 79688, 92495, 99610, 113840, 129493, 147992, 159376, 184990, 199220, 227680, 258986, 295984, 318752, 369980, 398440, 517972, 591968, 647465, 739960, 796880, 1035944, 1294930, 1479920, 1593760, 2071888, 2589860, 2959840, 4143776, 5179720, 10359440, 20718880]

約数ペア:

[(1, 20718880), (2, 10359440), (4, 5179720), (5, 4143776), (7, 2959840), (8, 2589860), (10, 2071888), (13, 1593760), (14, 1479920), (16, 1294930), (20, 1035944), (26, 796880), (28, 739960), (32, 647465), (35, 591968), (40, 517972), (52, 398440), (56, 369980), (65, 318752), (70, 295984), (80, 258986), (91, 227680), (104, 199220), (112, 184990), (130, 159376), (140, 147992), (160, 129493), (182, 113840), (208, 99610), (224, 92495), (260, 79688), (280, 73996), (364, 56920), (416, 49805), (455, 45536), (520, 39844), (560, 36998), (728, 28460), (910, 22768), (1040, 19922), (1120, 18499), (1423, 14560), (1456, 14230), (1820, 11384), (2080, 9961), (2846, 7280), (2912, 7115), (3640, 5692)]