19405685

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 26345088

約数和(自身を除く): 6939403

約数列:

[1, 5, 13, 43, 53, 65, 131, 215, 265, 559, 655, 689, 1703, 2279, 2795, 3445, 5633, 6943, 8515, 11395, 28165, 29627, 34715, 73229, 90259, 148135, 298549, 366145, 451295, 1492745, 3881137, 19405685]

約数ペア:

[(1, 19405685), (5, 3881137), (13, 1492745), (43, 451295), (53, 366145), (65, 298549), (131, 148135), (215, 90259), (265, 73229), (559, 34715), (655, 29627), (689, 28165), (1703, 11395), (2279, 8515), (2795, 6943), (3445, 5633)]