28916727

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{137}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 48840960

約数和(自身を除く): 19924233

約数列:

[1, 3, 7, 19, 21, 23, 57, 69, 133, 137, 161, 399, 411, 437, 483, 529, 959, 1311, 1587, 2603, 2877, 3059, 3151, 3703, 7809, 9177, 9453, 10051, 11109, 18221, 22057, 30153, 54663, 59869, 66171, 70357, 72473, 179607, 211071, 217419, 419083, 507311, 1257249, 1376987, 1521933, 4130961, 9638909, 28916727]

約数ペア:

[(1, 28916727), (3, 9638909), (7, 4130961), (19, 1521933), (21, 1376987), (23, 1257249), (57, 507311), (69, 419083), (133, 217419), (137, 211071), (161, 179607), (399, 72473), (411, 70357), (437, 66171), (483, 59869), (529, 54663), (959, 30153), (1311, 22057), (1587, 18221), (2603, 11109), (2877, 10051), (3059, 9453), (3151, 9177), (3703, 7809)]