19982755

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1$

素因数の和:307

約数の個数: 32

約数和(自身を含む): 27353088

約数和(自身を除く): 7370333

約数列:

[1, 5, 13, 31, 47, 65, 155, 211, 235, 403, 611, 1055, 1457, 2015, 2743, 3055, 6541, 7285, 9917, 13715, 18941, 32705, 49585, 85033, 94705, 128921, 307427, 425165, 644605, 1537135, 3996551, 19982755]

約数ペア:

[(1, 19982755), (5, 3996551), (13, 1537135), (31, 644605), (47, 425165), (65, 307427), (155, 128921), (211, 94705), (235, 85033), (403, 49585), (611, 32705), (1055, 18941), (1457, 13715), (2015, 9917), (2743, 7285), (3055, 6541)]