77890840

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{157}}^2$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 178610400

約数和(自身を除く): 100719560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 157, 158, 314, 316, 395, 628, 632, 785, 790, 1256, 1570, 1580, 3140, 3160, 6280, 12403, 24649, 24806, 49298, 49612, 62015, 98596, 99224, 123245, 124030, 197192, 246490, 248060, 492980, 496120, 985960, 1947271, 3894542, 7789084, 9736355, 15578168, 19472710, 38945420, 77890840]

約数ペア:

[(1, 77890840), (2, 38945420), (4, 19472710), (5, 15578168), (8, 9736355), (10, 7789084), (20, 3894542), (40, 1947271), (79, 985960), (157, 496120), (158, 492980), (314, 248060), (316, 246490), (395, 197192), (628, 124030), (632, 123245), (785, 99224), (790, 98596), (1256, 62015), (1570, 49612), (1580, 49298), (3140, 24806), (3160, 24649), (6280, 12403)]