21705195

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{1217}}^1$

素因数の和:1295

約数の個数: 32

約数和(自身を含む): 36832320

約数和(自身を除く): 15127125

約数列:

[1, 3, 5, 15, 29, 41, 87, 123, 145, 205, 435, 615, 1189, 1217, 3567, 3651, 5945, 6085, 17835, 18255, 35293, 49897, 105879, 149691, 176465, 249485, 529395, 748455, 1447013, 4341039, 7235065, 21705195]

約数ペア:

[(1, 21705195), (3, 7235065), (5, 4341039), (15, 1447013), (29, 748455), (41, 529395), (87, 249485), (123, 176465), (145, 149691), (205, 105879), (435, 49897), (615, 35293), (1189, 18255), (1217, 17835), (3567, 6085), (3651, 5945)]