28311381

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 48746880

約数和(自身を除く): 20435499

約数列:

[1, 3, 7, 9, 21, 53, 61, 63, 139, 159, 183, 371, 417, 427, 477, 549, 973, 1113, 1251, 1281, 2919, 3233, 3339, 3843, 7367, 8479, 8757, 9699, 22101, 22631, 25437, 29097, 51569, 59353, 66303, 67893, 76311, 154707, 178059, 203679, 449387, 464121, 534177, 1348161, 3145709, 4044483, 9437127, 28311381]

約数ペア:

[(1, 28311381), (3, 9437127), (7, 4044483), (9, 3145709), (21, 1348161), (53, 534177), (61, 464121), (63, 449387), (139, 203679), (159, 178059), (183, 154707), (371, 76311), (417, 67893), (427, 66303), (477, 59353), (549, 51569), (973, 29097), (1113, 25437), (1251, 22631), (1281, 22101), (2919, 9699), (3233, 8757), (3339, 8479), (3843, 7367)]