19929325

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 27570780

約数和(自身を除く): 7641455

約数列:

[1, 5, 13, 25, 53, 65, 89, 169, 265, 325, 445, 689, 845, 1157, 1325, 2225, 3445, 4225, 4717, 5785, 8957, 15041, 17225, 23585, 28925, 44785, 61321, 75205, 117925, 223925, 306605, 376025, 797173, 1533025, 3985865, 19929325]

約数ペア:

[(1, 19929325), (5, 3985865), (13, 1533025), (25, 797173), (53, 376025), (65, 306605), (89, 223925), (169, 117925), (265, 75205), (325, 61321), (445, 44785), (689, 28925), (845, 23585), (1157, 17225), (1325, 15041), (2225, 8957), (3445, 5785), (4225, 4717)]