21504189

素因数分解:

$3^1\times 7^2\times {\mathrm{241}}^1\times {\mathrm{607}}^1$

素因数の和:865

約数の個数: 24

約数和(自身を含む): 33547008

約数和(自身を除く): 12042819

約数列:

[1, 3, 7, 21, 49, 147, 241, 607, 723, 1687, 1821, 4249, 5061, 11809, 12747, 29743, 35427, 89229, 146287, 438861, 1024009, 3072027, 7168063, 21504189]

約数ペア:

[(1, 21504189), (3, 7168063), (7, 3072027), (21, 1024009), (49, 438861), (147, 146287), (241, 89229), (607, 35427), (723, 29743), (1687, 12747), (1821, 11809), (4249, 5061)]