21195909

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{10853}}^1$

素因数の和:10897

約数の個数: 24

約数和(自身を含む): 36122112

約数和(自身を除く): 14926203

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 10853, 32559, 75971, 97677, 227913, 336443, 683739, 1009329, 2355101, 3027987, 7065303, 21195909]

約数ペア:

[(1, 21195909), (3, 7065303), (7, 3027987), (9, 2355101), (21, 1009329), (31, 683739), (63, 336443), (93, 227913), (217, 97677), (279, 75971), (651, 32559), (1953, 10853)]