20639360

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{271}}^1$

素因数の和:314

約数の個数: 128

約数和(自身を含む): 59927040

約数和(自身を除く): 39287680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 56, 64, 68, 70, 80, 85, 112, 119, 128, 136, 140, 160, 170, 224, 238, 271, 272, 280, 320, 340, 448, 476, 542, 544, 560, 595, 640, 680, 896, 952, 1084, 1088, 1120, 1190, 1355, 1360, 1897, 1904, 2168, 2176, 2240, 2380, 2710, 2720, 3794, 3808, 4336, 4480, 4607, 4760, 5420, 5440, 7588, 7616, 8672, 9214, 9485, 9520, 10840, 10880, 15176, 15232, 17344, 18428, 18970, 19040, 21680, 23035, 30352, 32249, 34688, 36856, 37940, 38080, 43360, 46070, 60704, 64498, 73712, 75880, 76160, 86720, 92140, 121408, 128996, 147424, 151760, 161245, 173440, 184280, 242816, 257992, 294848, 303520, 322490, 368560, 515984, 589696, 607040, 644980, 737120, 1031968, 1214080, 1289960, 1474240, 2063936, 2579920, 2948480, 4127872, 5159840, 10319680, 20639360]

約数ペア:

[(1, 20639360), (2, 10319680), (4, 5159840), (5, 4127872), (7, 2948480), (8, 2579920), (10, 2063936), (14, 1474240), (16, 1289960), (17, 1214080), (20, 1031968), (28, 737120), (32, 644980), (34, 607040), (35, 589696), (40, 515984), (56, 368560), (64, 322490), (68, 303520), (70, 294848), (80, 257992), (85, 242816), (112, 184280), (119, 173440), (128, 161245), (136, 151760), (140, 147424), (160, 128996), (170, 121408), (224, 92140), (238, 86720), (271, 76160), (272, 75880), (280, 73712), (320, 64498), (340, 60704), (448, 46070), (476, 43360), (542, 38080), (544, 37940), (560, 36856), (595, 34688), (640, 32249), (680, 30352), (896, 23035), (952, 21680), (1084, 19040), (1088, 18970), (1120, 18428), (1190, 17344), (1355, 15232), (1360, 15176), (1897, 10880), (1904, 10840), (2168, 9520), (2176, 9485), (2240, 9214), (2380, 8672), (2710, 7616), (2720, 7588), (3794, 5440), (3808, 5420), (4336, 4760), (4480, 4607)]