21563978

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{839}}^1$

素因数の和:1093

約数の個数: 16

約数和(自身を含む): 33022080

約数和(自身を除く): 11458102

約数列:

[1, 2, 71, 142, 181, 362, 839, 1678, 12851, 25702, 59569, 119138, 151859, 303718, 10781989, 21563978]

約数ペア:

[(1, 21563978), (2, 10781989), (71, 303718), (142, 151859), (181, 119138), (362, 59569), (839, 25702), (1678, 12851)]