21920005

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{457}}^1$

素因数の和:696

約数の個数: 16

約数和(自身を含む): 27007344

約数和(自身を除く): 5087339

約数列:

[1, 5, 53, 181, 265, 457, 905, 2285, 9593, 24221, 47965, 82717, 121105, 413585, 4384001, 21920005]

約数ペア:

[(1, 21920005), (5, 4384001), (53, 413585), (181, 121105), (265, 82717), (457, 47965), (905, 24221), (2285, 9593)]