18808993

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{227}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 23392800

約数和(自身を除く): 4583807

約数列:

[1, 7, 19, 49, 89, 133, 227, 623, 931, 1589, 1691, 4313, 4361, 11123, 11837, 20203, 30191, 82859, 141421, 211337, 383857, 989947, 2686999, 18808993]

約数ペア:

[(1, 18808993), (7, 2686999), (19, 989947), (49, 383857), (89, 211337), (133, 141421), (227, 82859), (623, 30191), (931, 20203), (1589, 11837), (1691, 11123), (4313, 4361)]