21515085

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:195

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19127475

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 53, 93, 97, 135, 155, 159, 265, 279, 291, 465, 477, 485, 795, 837, 873, 1395, 1431, 1455, 1643, 2385, 2619, 3007, 4185, 4365, 4929, 5141, 7155, 8215, 9021, 13095, 14787, 15035, 15423, 24645, 25705, 27063, 44361, 45105, 46269, 73935, 77115, 81189, 135315, 138807, 159371, 221805, 231345, 405945, 478113, 694035, 796855, 1434339, 2390565, 4303017, 7171695, 21515085]

約数ペア:

[(1, 21515085), (3, 7171695), (5, 4303017), (9, 2390565), (15, 1434339), (27, 796855), (31, 694035), (45, 478113), (53, 405945), (93, 231345), (97, 221805), (135, 159371), (155, 138807), (159, 135315), (265, 81189), (279, 77115), (291, 73935), (465, 46269), (477, 45105), (485, 44361), (795, 27063), (837, 25705), (873, 24645), (1395, 15423), (1431, 15035), (1455, 14787), (1643, 13095), (2385, 9021), (2619, 8215), (3007, 7155), (4185, 5141), (4365, 4929)]