21602815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 29417472

約数和(自身を除く): 7814657

約数列:

[1, 5, 13, 31, 65, 71, 151, 155, 355, 403, 755, 923, 1963, 2015, 2201, 4615, 4681, 9815, 10721, 11005, 23405, 28613, 53605, 60853, 139373, 143065, 304265, 332351, 696865, 1661755, 4320563, 21602815]

約数ペア:

[(1, 21602815), (5, 4320563), (13, 1661755), (31, 696865), (65, 332351), (71, 304265), (151, 143065), (155, 139373), (355, 60853), (403, 53605), (755, 28613), (923, 23405), (1963, 11005), (2015, 10721), (2201, 9815), (4615, 4681)]