20399120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{499}}^1$

素因数の和:592

約数の個数: 80

約数和(自身を含む): 55056000

約数和(自身を除く): 34656880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 73, 80, 112, 140, 146, 280, 292, 365, 499, 511, 560, 584, 730, 998, 1022, 1168, 1460, 1996, 2044, 2495, 2555, 2920, 3493, 3992, 4088, 4990, 5110, 5840, 6986, 7984, 8176, 9980, 10220, 13972, 17465, 19960, 20440, 27944, 34930, 36427, 39920, 40880, 55888, 69860, 72854, 139720, 145708, 182135, 254989, 279440, 291416, 364270, 509978, 582832, 728540, 1019956, 1274945, 1457080, 2039912, 2549890, 2914160, 4079824, 5099780, 10199560, 20399120]

約数ペア:

[(1, 20399120), (2, 10199560), (4, 5099780), (5, 4079824), (7, 2914160), (8, 2549890), (10, 2039912), (14, 1457080), (16, 1274945), (20, 1019956), (28, 728540), (35, 582832), (40, 509978), (56, 364270), (70, 291416), (73, 279440), (80, 254989), (112, 182135), (140, 145708), (146, 139720), (280, 72854), (292, 69860), (365, 55888), (499, 40880), (511, 39920), (560, 36427), (584, 34930), (730, 27944), (998, 20440), (1022, 19960), (1168, 17465), (1460, 13972), (1996, 10220), (2044, 9980), (2495, 8176), (2555, 7984), (2920, 6986), (3493, 5840), (3992, 5110), (4088, 4990)]