21253785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{4937}}^1$

素因数の和:4993

約数の個数: 32

約数和(自身を含む): 39820032

約数和(自身を除く): 18566247

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 105, 123, 205, 287, 615, 861, 1435, 4305, 4937, 14811, 24685, 34559, 74055, 103677, 172795, 202417, 518385, 607251, 1012085, 1416919, 3036255, 4250757, 7084595, 21253785]

約数ペア:

[(1, 21253785), (3, 7084595), (5, 4250757), (7, 3036255), (15, 1416919), (21, 1012085), (35, 607251), (41, 518385), (105, 202417), (123, 172795), (205, 103677), (287, 74055), (615, 34559), (861, 24685), (1435, 14811), (4305, 4937)]