21764015

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1543}}^1$

素因数の和:1599

約数の個数: 32

約数和(自身を含む): 33202176

約数和(自身を除く): 11438161

約数列:

[1, 5, 7, 13, 31, 35, 65, 91, 155, 217, 403, 455, 1085, 1543, 2015, 2821, 7715, 10801, 14105, 20059, 47833, 54005, 100295, 140413, 239165, 334831, 621829, 702065, 1674155, 3109145, 4352803, 21764015]

約数ペア:

[(1, 21764015), (5, 4352803), (7, 3109145), (13, 1674155), (31, 702065), (35, 621829), (65, 334831), (91, 239165), (155, 140413), (217, 100295), (403, 54005), (455, 47833), (1085, 20059), (1543, 14105), (2015, 10801), (2821, 7715)]