20837180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^2$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 54364128

約数和(自身を除く): 33526948

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 107, 130, 140, 182, 214, 260, 364, 428, 455, 535, 749, 910, 1070, 1391, 1498, 1820, 2140, 2782, 2996, 3745, 5564, 6955, 7490, 9737, 11449, 13910, 14980, 19474, 22898, 27820, 38948, 45796, 48685, 57245, 80143, 97370, 114490, 148837, 160286, 194740, 228980, 297674, 320572, 400715, 595348, 744185, 801430, 1041859, 1488370, 1602860, 2083718, 2976740, 4167436, 5209295, 10418590, 20837180]

約数ペア:

[(1, 20837180), (2, 10418590), (4, 5209295), (5, 4167436), (7, 2976740), (10, 2083718), (13, 1602860), (14, 1488370), (20, 1041859), (26, 801430), (28, 744185), (35, 595348), (52, 400715), (65, 320572), (70, 297674), (91, 228980), (107, 194740), (130, 160286), (140, 148837), (182, 114490), (214, 97370), (260, 80143), (364, 57245), (428, 48685), (455, 45796), (535, 38948), (749, 27820), (910, 22898), (1070, 19474), (1391, 14980), (1498, 13910), (1820, 11449), (2140, 9737), (2782, 7490), (2996, 6955), (3745, 5564)]