21869973

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:139

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 15454827

約数列:

[1, 3, 9, 17, 27, 29, 31, 51, 53, 87, 93, 153, 159, 261, 279, 459, 477, 493, 527, 783, 837, 899, 901, 1431, 1479, 1537, 1581, 1643, 2697, 2703, 4437, 4611, 4743, 4929, 8091, 8109, 13311, 13833, 14229, 14787, 15283, 24273, 24327, 26129, 27931, 41499, 44361, 45849, 47647, 78387, 83793, 137547, 142941, 235161, 251379, 412641, 428823, 705483, 754137, 809999, 1286469, 2429997, 7289991, 21869973]

約数ペア:

[(1, 21869973), (3, 7289991), (9, 2429997), (17, 1286469), (27, 809999), (29, 754137), (31, 705483), (51, 428823), (53, 412641), (87, 251379), (93, 235161), (153, 142941), (159, 137547), (261, 83793), (279, 78387), (459, 47647), (477, 45849), (493, 44361), (527, 41499), (783, 27931), (837, 26129), (899, 24327), (901, 24273), (1431, 15283), (1479, 14787), (1537, 14229), (1581, 13833), (1643, 13311), (2697, 8109), (2703, 8091), (4437, 4929), (4611, 4743)]