20434540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{643}}^1$

素因数の和:886

約数の個数: 48

約数和(自身を含む): 49335552

約数和(自身を除く): 28901012

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 227, 454, 643, 908, 1135, 1286, 1589, 2270, 2572, 3178, 3215, 4501, 4540, 6356, 6430, 7945, 9002, 12860, 15890, 18004, 22505, 31780, 45010, 90020, 145961, 291922, 583844, 729805, 1021727, 1459610, 2043454, 2919220, 4086908, 5108635, 10217270, 20434540]

約数ペア:

[(1, 20434540), (2, 10217270), (4, 5108635), (5, 4086908), (7, 2919220), (10, 2043454), (14, 1459610), (20, 1021727), (28, 729805), (35, 583844), (70, 291922), (140, 145961), (227, 90020), (454, 45010), (643, 31780), (908, 22505), (1135, 18004), (1286, 15890), (1589, 12860), (2270, 9002), (2572, 7945), (3178, 6430), (3215, 6356), (4501, 4540)]