20185305

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{947}}^1$

素因数の和:998

約数の個数: 48

約数和(自身を含む): 38905920

約数和(自身を除く): 18720615

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 145, 147, 203, 245, 435, 609, 735, 947, 1015, 1421, 2841, 3045, 4263, 4735, 6629, 7105, 14205, 19887, 21315, 27463, 33145, 46403, 82389, 99435, 137315, 139209, 192241, 232015, 411945, 576723, 696045, 961205, 1345687, 2883615, 4037061, 6728435, 20185305]

約数ペア:

[(1, 20185305), (3, 6728435), (5, 4037061), (7, 2883615), (15, 1345687), (21, 961205), (29, 696045), (35, 576723), (49, 411945), (87, 232015), (105, 192241), (145, 139209), (147, 137315), (203, 99435), (245, 82389), (435, 46403), (609, 33145), (735, 27463), (947, 21315), (1015, 19887), (1421, 14205), (2841, 7105), (3045, 6629), (4263, 4735)]