20678745

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^2\times {\mathrm{53}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 36469440

約数和(自身を除く): 15790695

約数列:

[1, 3, 5, 15, 19, 37, 53, 57, 95, 111, 159, 185, 265, 285, 555, 703, 795, 1007, 1369, 1961, 2109, 3021, 3515, 4107, 5035, 5883, 6845, 9805, 10545, 15105, 20535, 26011, 29415, 37259, 72557, 78033, 111777, 130055, 186295, 217671, 362785, 390165, 558885, 1088355, 1378583, 4135749, 6892915, 20678745]

約数ペア:

[(1, 20678745), (3, 6892915), (5, 4135749), (15, 1378583), (19, 1088355), (37, 558885), (53, 390165), (57, 362785), (95, 217671), (111, 186295), (159, 130055), (185, 111777), (265, 78033), (285, 72557), (555, 37259), (703, 29415), (795, 26011), (1007, 20535), (1369, 15105), (1961, 10545), (2109, 9805), (3021, 6845), (3515, 5883), (4107, 5035)]