18994220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{643}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 45873408

約数和(自身を除く): 26879188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 643, 844, 1055, 1286, 1477, 2110, 2572, 2954, 3215, 4220, 4501, 5908, 6430, 7385, 9002, 12860, 14770, 18004, 22505, 29540, 45010, 90020, 135673, 271346, 542692, 678365, 949711, 1356730, 1899422, 2713460, 3798844, 4748555, 9497110, 18994220]

約数ペア:

[(1, 18994220), (2, 9497110), (4, 4748555), (5, 3798844), (7, 2713460), (10, 1899422), (14, 1356730), (20, 949711), (28, 678365), (35, 542692), (70, 271346), (140, 135673), (211, 90020), (422, 45010), (643, 29540), (844, 22505), (1055, 18004), (1286, 14770), (1477, 12860), (2110, 9002), (2572, 7385), (2954, 6430), (3215, 5908), (4220, 4501)]