21252615

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1\times {\mathrm{257}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 35294400

約数和(自身を除く): 14041785

約数列:

[1, 3, 5, 15, 37, 111, 149, 185, 257, 447, 555, 745, 771, 1285, 2235, 3855, 5513, 9509, 16539, 27565, 28527, 38293, 47545, 82695, 114879, 142635, 191465, 574395, 1416841, 4250523, 7084205, 21252615]

約数ペア:

[(1, 21252615), (3, 7084205), (5, 4250523), (15, 1416841), (37, 574395), (111, 191465), (149, 142635), (185, 114879), (257, 82695), (447, 47545), (555, 38293), (745, 28527), (771, 27565), (1285, 16539), (2235, 9509), (3855, 5513)]