20105420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{337}}^1$

素因数の和:522

約数の個数: 48

約数和(自身を含む): 44859360

約数和(自身を除く): 24753940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 157, 190, 314, 337, 380, 628, 674, 785, 1348, 1570, 1685, 2983, 3140, 3370, 5966, 6403, 6740, 11932, 12806, 14915, 25612, 29830, 32015, 52909, 59660, 64030, 105818, 128060, 211636, 264545, 529090, 1005271, 1058180, 2010542, 4021084, 5026355, 10052710, 20105420]

約数ペア:

[(1, 20105420), (2, 10052710), (4, 5026355), (5, 4021084), (10, 2010542), (19, 1058180), (20, 1005271), (38, 529090), (76, 264545), (95, 211636), (157, 128060), (190, 105818), (314, 64030), (337, 59660), (380, 52909), (628, 32015), (674, 29830), (785, 25612), (1348, 14915), (1570, 12806), (1685, 11932), (2983, 6740), (3140, 6403), (3370, 5966)]