21081051

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 34045440

約数和(自身を除く): 12964389

約数列:

[1, 3, 9, 19, 43, 47, 57, 61, 129, 141, 171, 183, 387, 423, 549, 817, 893, 1159, 2021, 2451, 2623, 2679, 2867, 3477, 6063, 7353, 7869, 8037, 8601, 10431, 18189, 23607, 25803, 38399, 49837, 54473, 115197, 123281, 149511, 163419, 345591, 369843, 448533, 490257, 1109529, 2342339, 7027017, 21081051]

約数ペア:

[(1, 21081051), (3, 7027017), (9, 2342339), (19, 1109529), (43, 490257), (47, 448533), (57, 369843), (61, 345591), (129, 163419), (141, 149511), (171, 123281), (183, 115197), (387, 54473), (423, 49837), (549, 38399), (817, 25803), (893, 23607), (1159, 18189), (2021, 10431), (2451, 8601), (2623, 8037), (2679, 7869), (2867, 7353), (3477, 6063)]