18706779

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^2\times {\mathrm{251}}^1$

素因数の和:297

約数の個数: 54

約数和(自身を含む): 34171956

約数和(自身を除く): 15465177

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 169, 251, 273, 441, 507, 637, 753, 819, 1183, 1521, 1757, 1911, 2259, 3263, 3549, 5271, 5733, 8281, 9789, 10647, 12299, 15813, 22841, 24843, 29367, 36897, 42419, 68523, 74529, 110691, 127257, 159887, 205569, 296933, 381771, 479661, 890799, 1438983, 2078531, 2672397, 6235593, 18706779]

約数ペア:

[(1, 18706779), (3, 6235593), (7, 2672397), (9, 2078531), (13, 1438983), (21, 890799), (39, 479661), (49, 381771), (63, 296933), (91, 205569), (117, 159887), (147, 127257), (169, 110691), (251, 74529), (273, 68523), (441, 42419), (507, 36897), (637, 29367), (753, 24843), (819, 22841), (1183, 15813), (1521, 12299), (1757, 10647), (1911, 9789), (2259, 8281), (3263, 5733), (3549, 5271)]