16680020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{421}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 40268928

約数和(自身を除く): 23588908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 283, 421, 566, 842, 1132, 1415, 1684, 1981, 2105, 2830, 2947, 3962, 4210, 5660, 5894, 7924, 8420, 9905, 11788, 14735, 19810, 29470, 39620, 58940, 119143, 238286, 476572, 595715, 834001, 1191430, 1668002, 2382860, 3336004, 4170005, 8340010, 16680020]

約数ペア:

[(1, 16680020), (2, 8340010), (4, 4170005), (5, 3336004), (7, 2382860), (10, 1668002), (14, 1191430), (20, 834001), (28, 595715), (35, 476572), (70, 238286), (140, 119143), (283, 58940), (421, 39620), (566, 29470), (842, 19810), (1132, 14735), (1415, 11788), (1684, 9905), (1981, 8420), (2105, 7924), (2830, 5894), (2947, 5660), (3962, 4210)]