20216475

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4729}}^1$

素因数の和:4764

約数の個数: 36

約数和(自身を含む): 38123800

約数和(自身を除く): 17907325

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4729, 14187, 23645, 42561, 70935, 89851, 118225, 212805, 269553, 354675, 449255, 808659, 1064025, 1347765, 2246275, 4043295, 6738825, 20216475]

約数ペア:

[(1, 20216475), (3, 6738825), (5, 4043295), (9, 2246275), (15, 1347765), (19, 1064025), (25, 808659), (45, 449255), (57, 354675), (75, 269553), (95, 212805), (171, 118225), (225, 89851), (285, 70935), (475, 42561), (855, 23645), (1425, 14187), (4275, 4729)]