20778790

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{523}}^1$

素因数の和:696

約数の個数: 32

約数和(自身を含む): 39048480

約数和(自身を除く): 18269690

約数列:

[1, 2, 5, 10, 29, 58, 137, 145, 274, 290, 523, 685, 1046, 1370, 2615, 3973, 5230, 7946, 15167, 19865, 30334, 39730, 71651, 75835, 143302, 151670, 358255, 716510, 2077879, 4155758, 10389395, 20778790]

約数ペア:

[(1, 20778790), (2, 10389395), (5, 4155758), (10, 2077879), (29, 716510), (58, 358255), (137, 151670), (145, 143302), (274, 75835), (290, 71651), (523, 39730), (685, 30334), (1046, 19865), (1370, 15167), (2615, 7946), (3973, 5230)]