20159720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71999}}^1$

素因数の和:72017

約数の個数: 32

約数和(自身を含む): 51840000

約数和(自身を除く): 31680280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71999, 143998, 287996, 359995, 503993, 575992, 719990, 1007986, 1439980, 2015972, 2519965, 2879960, 4031944, 5039930, 10079860, 20159720]

約数ペア:

[(1, 20159720), (2, 10079860), (4, 5039930), (5, 4031944), (7, 2879960), (8, 2519965), (10, 2015972), (14, 1439980), (20, 1007986), (28, 719990), (35, 575992), (40, 503993), (56, 359995), (70, 287996), (140, 143998), (280, 71999)]