20021120

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:176

約数の個数: 128

約数和(自身を含む): 56548800

約数和(自身を除く): 36527680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 41, 56, 64, 70, 80, 82, 109, 112, 128, 140, 160, 164, 205, 218, 224, 280, 287, 320, 328, 410, 436, 448, 545, 560, 574, 640, 656, 763, 820, 872, 896, 1090, 1120, 1148, 1312, 1435, 1526, 1640, 1744, 2180, 2240, 2296, 2624, 2870, 3052, 3280, 3488, 3815, 4360, 4469, 4480, 4592, 5248, 5740, 6104, 6560, 6976, 7630, 8720, 8938, 9184, 11480, 12208, 13120, 13952, 15260, 17440, 17876, 18368, 22345, 22960, 24416, 26240, 30520, 31283, 34880, 35752, 36736, 44690, 45920, 48832, 61040, 62566, 69760, 71504, 89380, 91840, 97664, 122080, 125132, 143008, 156415, 178760, 183680, 244160, 250264, 286016, 312830, 357520, 488320, 500528, 572032, 625660, 715040, 1001056, 1251320, 1430080, 2002112, 2502640, 2860160, 4004224, 5005280, 10010560, 20021120]

約数ペア:

[(1, 20021120), (2, 10010560), (4, 5005280), (5, 4004224), (7, 2860160), (8, 2502640), (10, 2002112), (14, 1430080), (16, 1251320), (20, 1001056), (28, 715040), (32, 625660), (35, 572032), (40, 500528), (41, 488320), (56, 357520), (64, 312830), (70, 286016), (80, 250264), (82, 244160), (109, 183680), (112, 178760), (128, 156415), (140, 143008), (160, 125132), (164, 122080), (205, 97664), (218, 91840), (224, 89380), (280, 71504), (287, 69760), (320, 62566), (328, 61040), (410, 48832), (436, 45920), (448, 44690), (545, 36736), (560, 35752), (574, 34880), (640, 31283), (656, 30520), (763, 26240), (820, 24416), (872, 22960), (896, 22345), (1090, 18368), (1120, 17876), (1148, 17440), (1312, 15260), (1435, 13952), (1526, 13120), (1640, 12208), (1744, 11480), (2180, 9184), (2240, 8938), (2296, 8720), (2624, 7630), (2870, 6976), (3052, 6560), (3280, 6104), (3488, 5740), (3815, 5248), (4360, 4592), (4469, 4480)]