20614580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{643}}^1$

素因数の和:888

約数の個数: 48

約数和(自身を含む): 49768320

約数和(自身を除く): 29153740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 229, 458, 643, 916, 1145, 1286, 1603, 2290, 2572, 3206, 3215, 4501, 4580, 6412, 6430, 8015, 9002, 12860, 16030, 18004, 22505, 32060, 45010, 90020, 147247, 294494, 588988, 736235, 1030729, 1472470, 2061458, 2944940, 4122916, 5153645, 10307290, 20614580]

約数ペア:

[(1, 20614580), (2, 10307290), (4, 5153645), (5, 4122916), (7, 2944940), (10, 2061458), (14, 1472470), (20, 1030729), (28, 736235), (35, 588988), (70, 294494), (140, 147247), (229, 90020), (458, 45010), (643, 32060), (916, 22505), (1145, 18004), (1286, 16030), (1603, 12860), (2290, 9002), (2572, 8015), (3206, 6430), (3215, 6412), (4501, 4580)]