80638880

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{71999}}^1$

素因数の和:72021

約数の個数: 48

約数和(自身を含む): 217728000

約数和(自身を除く): 137089120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 71999, 143998, 287996, 359995, 503993, 575992, 719990, 1007986, 1151984, 1439980, 2015972, 2303968, 2519965, 2879960, 4031944, 5039930, 5759920, 8063888, 10079860, 11519840, 16127776, 20159720, 40319440, 80638880]

約数ペア:

[(1, 80638880), (2, 40319440), (4, 20159720), (5, 16127776), (7, 11519840), (8, 10079860), (10, 8063888), (14, 5759920), (16, 5039930), (20, 4031944), (28, 2879960), (32, 2519965), (35, 2303968), (40, 2015972), (56, 1439980), (70, 1151984), (80, 1007986), (112, 719990), (140, 575992), (160, 503993), (224, 359995), (280, 287996), (560, 143998), (1120, 71999)]