21071427

素因数分解:

$3^1\times {\mathrm{13}}^3\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:204

約数の個数: 32

約数和(自身を含む): 31987200

約数和(自身を除く): 10915773

約数列:

[1, 3, 13, 23, 39, 69, 139, 169, 299, 417, 507, 897, 1807, 2197, 3197, 3887, 5421, 6591, 9591, 11661, 23491, 41561, 50531, 70473, 124683, 151593, 305383, 540293, 916149, 1620879, 7023809, 21071427]

約数ペア:

[(1, 21071427), (3, 7023809), (13, 1620879), (23, 916149), (39, 540293), (69, 305383), (139, 151593), (169, 124683), (299, 70473), (417, 50531), (507, 41561), (897, 23491), (1807, 11661), (2197, 9591), (3197, 6591), (3887, 5421)]