19808997

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{439}}^1$

素因数の和:557

約数の個数: 24

約数和(自身を含む): 28987200

約数和(自身を除く): 9178203

約数列:

[1, 3, 13, 39, 89, 169, 267, 439, 507, 1157, 1317, 3471, 5707, 15041, 17121, 39071, 45123, 74191, 117213, 222573, 507923, 1523769, 6602999, 19808997]

約数ペア:

[(1, 19808997), (3, 6602999), (13, 1523769), (39, 507923), (89, 222573), (169, 117213), (267, 74191), (439, 45123), (507, 39071), (1157, 17121), (1317, 15041), (3471, 5707)]