20965641

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 10138359

約数列:

[1, 3, 17, 31, 51, 89, 93, 149, 267, 447, 527, 1513, 1581, 2533, 2759, 4539, 4619, 7599, 8277, 13261, 13857, 39783, 46903, 78523, 140709, 225437, 235569, 411091, 676311, 1233273, 6988547, 20965641]

約数ペア:

[(1, 20965641), (3, 6988547), (17, 1233273), (31, 676311), (51, 411091), (89, 235569), (93, 225437), (149, 140709), (267, 78523), (447, 46903), (527, 39783), (1513, 13857), (1581, 13261), (2533, 8277), (2759, 7599), (4539, 4619)]