21993993

素因数分解:

$3^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{941}}^1$

素因数の和:1014

約数の個数: 36

約数和(自身を含む): 37693188

約数和(自身を除く): 15699195

約数列:

[1, 3, 7, 9, 21, 49, 53, 63, 147, 159, 371, 441, 477, 941, 1113, 2597, 2823, 3339, 6587, 7791, 8469, 19761, 23373, 46109, 49873, 59283, 138327, 149619, 349111, 414981, 448857, 1047333, 2443777, 3141999, 7331331, 21993993]

約数ペア:

[(1, 21993993), (3, 7331331), (7, 3141999), (9, 2443777), (21, 1047333), (49, 448857), (53, 414981), (63, 349111), (147, 149619), (159, 138327), (371, 59283), (441, 49873), (477, 46109), (941, 23373), (1113, 19761), (2597, 8469), (2823, 7791), (3339, 6587)]