18661643

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{181}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 25439232

約数和(自身を除く): 6777589

約数列:

[1, 7, 11, 13, 77, 91, 103, 143, 181, 721, 1001, 1133, 1267, 1339, 1991, 2353, 7931, 9373, 13937, 14729, 16471, 18643, 25883, 103103, 130501, 181181, 205073, 242359, 1435511, 1696513, 2665949, 18661643]

約数ペア:

[(1, 18661643), (7, 2665949), (11, 1696513), (13, 1435511), (77, 242359), (91, 205073), (103, 181181), (143, 130501), (181, 103103), (721, 25883), (1001, 18643), (1133, 16471), (1267, 14729), (1339, 13937), (1991, 9373), (2353, 7931)]