21250509

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:437

約数の個数: 32

約数和(自身を含む): 33640704

約数和(自身を除く): 12390195

約数列:

[1, 3, 7, 21, 53, 61, 159, 183, 313, 371, 427, 939, 1113, 1281, 2191, 3233, 6573, 9699, 16589, 19093, 22631, 49767, 57279, 67893, 116123, 133651, 348369, 400953, 1011929, 3035787, 7083503, 21250509]

約数ペア:

[(1, 21250509), (3, 7083503), (7, 3035787), (21, 1011929), (53, 400953), (61, 348369), (159, 133651), (183, 116123), (313, 67893), (371, 57279), (427, 49767), (939, 22631), (1113, 19093), (1281, 16589), (2191, 9699), (3233, 6573)]