21675789

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:135

約数の個数: 64

約数和(自身を含む): 36864000

約数和(自身を除く): 15188211

約数列:

[1, 3, 9, 19, 27, 29, 31, 47, 57, 87, 93, 141, 171, 261, 279, 423, 513, 551, 589, 783, 837, 893, 899, 1269, 1363, 1457, 1653, 1767, 2679, 2697, 4089, 4371, 4959, 5301, 8037, 8091, 12267, 13113, 14877, 15903, 17081, 24111, 24273, 25897, 27683, 36801, 39339, 42253, 51243, 77691, 83049, 126759, 153729, 233073, 249147, 380277, 461187, 699219, 747441, 802807, 1140831, 2408421, 7225263, 21675789]

約数ペア:

[(1, 21675789), (3, 7225263), (9, 2408421), (19, 1140831), (27, 802807), (29, 747441), (31, 699219), (47, 461187), (57, 380277), (87, 249147), (93, 233073), (141, 153729), (171, 126759), (261, 83049), (279, 77691), (423, 51243), (513, 42253), (551, 39339), (589, 36801), (783, 27683), (837, 25897), (893, 24273), (899, 24111), (1269, 17081), (1363, 15903), (1457, 14877), (1653, 13113), (1767, 12267), (2679, 8091), (2697, 8037), (4089, 5301), (4371, 4959)]