21555235

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19507}}^1$

素因数の和:19542

約数の個数: 16

約数和(自身を含む): 29496096

約数和(自身を除く): 7940861

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19507, 97535, 253591, 331619, 1267955, 1658095, 4311047, 21555235]

約数ペア:

[(1, 21555235), (5, 4311047), (13, 1658095), (17, 1267955), (65, 331619), (85, 253591), (221, 97535), (1105, 19507)]