19713615

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 32550336

約数和(自身を除く): 12836721

約数列:

[1, 3, 5, 15, 53, 137, 159, 181, 265, 411, 543, 685, 795, 905, 2055, 2715, 7261, 9593, 21783, 24797, 28779, 36305, 47965, 74391, 108915, 123985, 143895, 371955, 1314241, 3942723, 6571205, 19713615]

約数ペア:

[(1, 19713615), (3, 6571205), (5, 3942723), (15, 1314241), (53, 371955), (137, 143895), (159, 123985), (181, 108915), (265, 74391), (411, 47965), (543, 36305), (685, 28779), (795, 24797), (905, 21783), (2055, 9593), (2715, 7261)]