21079905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{18251}}^1$

素因数の和:18277

約数の個数: 32

約数和(自身を含む): 42052608

約数和(自身を除く): 20972703

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155, 18251, 54753, 91255, 127757, 200761, 273765, 383271, 602283, 638785, 1003805, 1405327, 1916355, 3011415, 4215981, 7026635, 21079905]

約数ペア:

[(1, 21079905), (3, 7026635), (5, 4215981), (7, 3011415), (11, 1916355), (15, 1405327), (21, 1003805), (33, 638785), (35, 602283), (55, 383271), (77, 273765), (105, 200761), (165, 127757), (231, 91255), (385, 54753), (1155, 18251)]