20786587905

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{419}}^1\times {\mathrm{757}}^1$

素因数の和:1458

約数の個数: 64

約数和(自身を含む): 35483132160

約数和(自身を除く): 14696544255

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 257, 419, 757, 771, 1257, 1285, 2095, 2271, 3785, 3855, 4369, 6285, 7123, 11355, 12869, 13107, 21369, 21845, 35615, 38607, 64345, 65535, 106845, 107683, 193035, 194549, 317183, 323049, 538415, 583647, 951549, 972745, 1585915, 1615245, 1830611, 2918235, 3307333, 4757745, 5392111, 5491833, 9153055, 9921999, 16176333, 16536665, 26960555, 27459165, 49609995, 80881665, 81516031, 244548093, 407580155, 1222740465, 1385772527, 4157317581, 6928862635, 20786587905]

約数ペア:

[(1, 20786587905), (3, 6928862635), (5, 4157317581), (15, 1385772527), (17, 1222740465), (51, 407580155), (85, 244548093), (255, 81516031), (257, 80881665), (419, 49609995), (757, 27459165), (771, 26960555), (1257, 16536665), (1285, 16176333), (2095, 9921999), (2271, 9153055), (3785, 5491833), (3855, 5392111), (4369, 4757745), (6285, 3307333), (7123, 2918235), (11355, 1830611), (12869, 1615245), (13107, 1585915), (21369, 972745), (21845, 951549), (35615, 583647), (38607, 538415), (64345, 323049), (65535, 317183), (106845, 194549), (107683, 193035)]