20984265

素因数分解:

$3^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1$

素因数の和:146

約数の個数: 64

約数和(自身を含む): 40147200

約数和(自身を除く): 19162935

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 81, 95, 101, 135, 171, 243, 285, 303, 405, 505, 513, 729, 855, 909, 1215, 1515, 1539, 1919, 2187, 2565, 2727, 3645, 4545, 4617, 5757, 7695, 8181, 9595, 10935, 13635, 13851, 17271, 23085, 24543, 28785, 40905, 41553, 51813, 69255, 73629, 86355, 122715, 155439, 207765, 220887, 259065, 368145, 466317, 777195, 1104435, 1398951, 2331585, 4196853, 6994755, 20984265]

約数ペア:

[(1, 20984265), (3, 6994755), (5, 4196853), (9, 2331585), (15, 1398951), (19, 1104435), (27, 777195), (45, 466317), (57, 368145), (81, 259065), (95, 220887), (101, 207765), (135, 155439), (171, 122715), (243, 86355), (285, 73629), (303, 69255), (405, 51813), (505, 41553), (513, 40905), (729, 28785), (855, 24543), (909, 23085), (1215, 17271), (1515, 13851), (1539, 13635), (1919, 10935), (2187, 9595), (2565, 8181), (2727, 7695), (3645, 5757), (4545, 4617)]