20716215

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:224

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17990985

約数列:

[1, 3, 5, 13, 15, 23, 31, 39, 65, 69, 93, 115, 149, 155, 195, 299, 345, 403, 447, 465, 713, 745, 897, 1209, 1495, 1937, 2015, 2139, 2235, 3427, 3565, 4485, 4619, 5811, 6045, 9269, 9685, 10281, 10695, 13857, 17135, 23095, 27807, 29055, 44551, 46345, 51405, 60047, 69285, 106237, 133653, 139035, 180141, 222755, 300235, 318711, 531185, 668265, 900705, 1381081, 1593555, 4143243, 6905405, 20716215]

約数ペア:

[(1, 20716215), (3, 6905405), (5, 4143243), (13, 1593555), (15, 1381081), (23, 900705), (31, 668265), (39, 531185), (65, 318711), (69, 300235), (93, 222755), (115, 180141), (149, 139035), (155, 133653), (195, 106237), (299, 69285), (345, 60047), (403, 51405), (447, 46345), (465, 44551), (713, 29055), (745, 27807), (897, 23095), (1209, 17135), (1495, 13857), (1937, 10695), (2015, 10281), (2139, 9685), (2235, 9269), (3427, 6045), (3565, 5811), (4485, 4619)]