21467215

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 33477696

約数和(自身を除く): 12010481

約数列:

[1, 5, 7, 11, 35, 37, 55, 77, 121, 137, 185, 259, 385, 407, 605, 685, 847, 959, 1295, 1507, 2035, 2849, 4235, 4477, 4795, 5069, 7535, 10549, 14245, 16577, 22385, 25345, 31339, 35483, 52745, 55759, 82885, 116039, 156695, 177415, 278795, 390313, 580195, 613349, 1951565, 3066745, 4293443, 21467215]

約数ペア:

[(1, 21467215), (5, 4293443), (7, 3066745), (11, 1951565), (35, 613349), (37, 580195), (55, 390313), (77, 278795), (121, 177415), (137, 156695), (185, 116039), (259, 82885), (385, 55759), (407, 52745), (605, 35483), (685, 31339), (847, 25345), (959, 22385), (1295, 16577), (1507, 14245), (2035, 10549), (2849, 7535), (4235, 5069), (4477, 4795)]