20720037

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{173}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 31102848

約数和(自身を除く): 10382811

約数列:

[1, 3, 13, 37, 39, 83, 111, 173, 249, 481, 519, 1079, 1443, 2249, 3071, 3237, 6401, 6747, 9213, 14359, 19203, 39923, 43077, 83213, 119769, 186667, 249639, 531283, 560001, 1593849, 6906679, 20720037]

約数ペア:

[(1, 20720037), (3, 6906679), (13, 1593849), (37, 560001), (39, 531283), (83, 249639), (111, 186667), (173, 119769), (249, 83213), (481, 43077), (519, 39923), (1079, 19203), (1443, 14359), (2249, 9213), (3071, 6747), (3237, 6401)]