21544185

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:202

約数の個数: 64

約数和(自身を含む): 40303872

約数和(自身を除く): 18759687

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 67, 85, 97, 195, 201, 221, 255, 291, 335, 485, 663, 871, 1005, 1105, 1139, 1261, 1455, 1649, 2613, 3315, 3417, 3783, 4355, 4947, 5695, 6305, 6499, 8245, 13065, 14807, 17085, 18915, 19497, 21437, 24735, 32495, 44421, 64311, 74035, 84487, 97485, 107185, 110483, 222105, 253461, 321555, 331449, 422435, 552415, 1267305, 1436279, 1657245, 4308837, 7181395, 21544185]

約数ペア:

[(1, 21544185), (3, 7181395), (5, 4308837), (13, 1657245), (15, 1436279), (17, 1267305), (39, 552415), (51, 422435), (65, 331449), (67, 321555), (85, 253461), (97, 222105), (195, 110483), (201, 107185), (221, 97485), (255, 84487), (291, 74035), (335, 64311), (485, 44421), (663, 32495), (871, 24735), (1005, 21437), (1105, 19497), (1139, 18915), (1261, 17085), (1455, 14807), (1649, 13065), (2613, 8245), (3315, 6499), (3417, 6305), (3783, 5695), (4355, 4947)]