20285020

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{2957}}^1$

素因数の和:2987

約数の個数: 48

約数和(自身を含む): 49694400

約数和(自身を除く): 29409380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 2957, 3430, 5914, 6860, 11828, 14785, 20699, 29570, 41398, 59140, 82796, 103495, 144893, 206990, 289786, 413980, 579572, 724465, 1014251, 1448930, 2028502, 2897860, 4057004, 5071255, 10142510, 20285020]

約数ペア:

[(1, 20285020), (2, 10142510), (4, 5071255), (5, 4057004), (7, 2897860), (10, 2028502), (14, 1448930), (20, 1014251), (28, 724465), (35, 579572), (49, 413980), (70, 289786), (98, 206990), (140, 144893), (196, 103495), (245, 82796), (343, 59140), (490, 41398), (686, 29570), (980, 20699), (1372, 14785), (1715, 11828), (2957, 6860), (3430, 5914)]