21810975

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^2\times {\mathrm{173}}^1$

素因数の和:268

約数の個数: 36

約数和(自身を含む): 37175448

約数和(自身を除く): 15364473

約数列:

[1, 3, 5, 15, 25, 41, 75, 123, 173, 205, 519, 615, 865, 1025, 1681, 2595, 3075, 4325, 5043, 7093, 8405, 12975, 21279, 25215, 35465, 42025, 106395, 126075, 177325, 290813, 531975, 872439, 1454065, 4362195, 7270325, 21810975]

約数ペア:

[(1, 21810975), (3, 7270325), (5, 4362195), (15, 1454065), (25, 872439), (41, 531975), (75, 290813), (123, 177325), (173, 126075), (205, 106395), (519, 42025), (615, 35465), (865, 25215), (1025, 21279), (1681, 12975), (2595, 8405), (3075, 7093), (4325, 5043)]