19900265

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 31051776

約数和(自身を除く): 11151511

約数列:

[1, 5, 7, 11, 35, 37, 55, 77, 121, 127, 185, 259, 385, 407, 605, 635, 847, 889, 1295, 1397, 2035, 2849, 4235, 4445, 4477, 4699, 6985, 9779, 14245, 15367, 22385, 23495, 31339, 32893, 48895, 51689, 76835, 107569, 156695, 164465, 258445, 361823, 537845, 568579, 1809115, 2842895, 3980053, 19900265]

約数ペア:

[(1, 19900265), (5, 3980053), (7, 2842895), (11, 1809115), (35, 568579), (37, 537845), (55, 361823), (77, 258445), (121, 164465), (127, 156695), (185, 107569), (259, 76835), (385, 51689), (407, 48895), (605, 32893), (635, 31339), (847, 23495), (889, 22385), (1295, 15367), (1397, 14245), (2035, 9779), (2849, 6985), (4235, 4699), (4445, 4477)]