21004945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19009}}^1$

素因数の和:19044

約数の個数: 16

約数和(自身を含む): 28743120

約数和(自身を除く): 7738175

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19009, 95045, 247117, 323153, 1235585, 1615765, 4200989, 21004945]

約数ペア:

[(1, 21004945), (5, 4200989), (13, 1615765), (17, 1235585), (65, 323153), (85, 247117), (221, 95045), (1105, 19009)]