20909760

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{947}}^1$

素因数の和:990

約数の個数: 112

約数和(自身を含む): 69348096

約数和(自身を除く): 48438336

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 32, 40, 46, 48, 60, 64, 69, 80, 92, 96, 115, 120, 138, 160, 184, 192, 230, 240, 276, 320, 345, 368, 460, 480, 552, 690, 736, 920, 947, 960, 1104, 1380, 1472, 1840, 1894, 2208, 2760, 2841, 3680, 3788, 4416, 4735, 5520, 5682, 7360, 7576, 9470, 11040, 11364, 14205, 15152, 18940, 21781, 22080, 22728, 28410, 30304, 37880, 43562, 45456, 56820, 60608, 65343, 75760, 87124, 90912, 108905, 113640, 130686, 151520, 174248, 181824, 217810, 227280, 261372, 303040, 326715, 348496, 435620, 454560, 522744, 653430, 696992, 871240, 909120, 1045488, 1306860, 1393984, 1742480, 2090976, 2613720, 3484960, 4181952, 5227440, 6969920, 10454880, 20909760]

約数ペア:

[(1, 20909760), (2, 10454880), (3, 6969920), (4, 5227440), (5, 4181952), (6, 3484960), (8, 2613720), (10, 2090976), (12, 1742480), (15, 1393984), (16, 1306860), (20, 1045488), (23, 909120), (24, 871240), (30, 696992), (32, 653430), (40, 522744), (46, 454560), (48, 435620), (60, 348496), (64, 326715), (69, 303040), (80, 261372), (92, 227280), (96, 217810), (115, 181824), (120, 174248), (138, 151520), (160, 130686), (184, 113640), (192, 108905), (230, 90912), (240, 87124), (276, 75760), (320, 65343), (345, 60608), (368, 56820), (460, 45456), (480, 43562), (552, 37880), (690, 30304), (736, 28410), (920, 22728), (947, 22080), (960, 21781), (1104, 18940), (1380, 15152), (1472, 14205), (1840, 11364), (1894, 11040), (2208, 9470), (2760, 7576), (2841, 7360), (3680, 5682), (3788, 5520), (4416, 4735)]