21397515

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{75079}}^1$

素因数の和:75106

約数の個数: 16

約数和(自身を含む): 36038400

約数和(自身を除く): 14640885

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 75079, 225237, 375395, 1126185, 1426501, 4279503, 7132505, 21397515]

約数ペア:

[(1, 21397515), (3, 7132505), (5, 4279503), (15, 1426501), (19, 1126185), (57, 375395), (95, 225237), (285, 75079)]