21207495

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61471}}^1$

素因数の和:61502

約数の個数: 16

約数和(自身を含む): 35407872

約数和(自身を除く): 14200377

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61471, 184413, 307355, 922065, 1413833, 4241499, 7069165, 21207495]

約数ペア:

[(1, 21207495), (3, 7069165), (5, 4241499), (15, 1413833), (23, 922065), (69, 307355), (115, 184413), (345, 61471)]