19919655

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{197}}^1$

素因数の和:325

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 21137625

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 107, 135, 189, 197, 315, 321, 535, 591, 749, 945, 963, 985, 1379, 1605, 1773, 2247, 2889, 2955, 3745, 4137, 4815, 5319, 6741, 6895, 8865, 11235, 12411, 14445, 20223, 20685, 21079, 26595, 33705, 37233, 62055, 63237, 101115, 105395, 147553, 186165, 189711, 316185, 442659, 569133, 737765, 948555, 1327977, 2213295, 2845665, 3983931, 6639885, 19919655]

約数ペア:

[(1, 19919655), (3, 6639885), (5, 3983931), (7, 2845665), (9, 2213295), (15, 1327977), (21, 948555), (27, 737765), (35, 569133), (45, 442659), (63, 316185), (105, 189711), (107, 186165), (135, 147553), (189, 105395), (197, 101115), (315, 63237), (321, 62055), (535, 37233), (591, 33705), (749, 26595), (945, 21079), (963, 20685), (985, 20223), (1379, 14445), (1605, 12411), (1773, 11235), (2247, 8865), (2889, 6895), (2955, 6741), (3745, 5319), (4137, 4815)]