19879720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70999}}^1$

素因数の和:71017

約数の個数: 32

約数和(自身を含む): 51120000

約数和(自身を除く): 31240280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70999, 141998, 283996, 354995, 496993, 567992, 709990, 993986, 1419980, 1987972, 2484965, 2839960, 3975944, 4969930, 9939860, 19879720]

約数ペア:

[(1, 19879720), (2, 9939860), (4, 4969930), (5, 3975944), (7, 2839960), (8, 2484965), (10, 1987972), (14, 1419980), (20, 993986), (28, 709990), (35, 567992), (40, 496993), (56, 354995), (70, 283996), (140, 141998), (280, 70999)]