21789999

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:297

約数の個数: 64

約数和(自身を含む): 41287680

約数和(自身を除く): 19497681

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 47, 63, 77, 99, 141, 189, 223, 231, 297, 329, 423, 517, 669, 693, 987, 1269, 1551, 1561, 2007, 2079, 2453, 2961, 3619, 4653, 4683, 6021, 7359, 8883, 10481, 10857, 13959, 14049, 17171, 22077, 31443, 32571, 42147, 51513, 66231, 73367, 94329, 97713, 115291, 154539, 220101, 282987, 345873, 463617, 660303, 807037, 1037619, 1980909, 2421111, 3112857, 7263333, 21789999]

約数ペア:

[(1, 21789999), (3, 7263333), (7, 3112857), (9, 2421111), (11, 1980909), (21, 1037619), (27, 807037), (33, 660303), (47, 463617), (63, 345873), (77, 282987), (99, 220101), (141, 154539), (189, 115291), (223, 97713), (231, 94329), (297, 73367), (329, 66231), (423, 51513), (517, 42147), (669, 32571), (693, 31443), (987, 22077), (1269, 17171), (1551, 14049), (1561, 13959), (2007, 10857), (2079, 10481), (2453, 8883), (2961, 7359), (3619, 6021), (4653, 4683)]