21906405

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{223}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 39836160

約数和(自身を除く): 17929755

約数列:

[1, 3, 5, 9, 15, 37, 45, 59, 111, 177, 185, 223, 295, 333, 531, 555, 669, 885, 1115, 1665, 2007, 2183, 2655, 3345, 6549, 8251, 10035, 10915, 13157, 19647, 24753, 32745, 39471, 41255, 65785, 74259, 98235, 118413, 123765, 197355, 371295, 486809, 592065, 1460427, 2434045, 4381281, 7302135, 21906405]

約数ペア:

[(1, 21906405), (3, 7302135), (5, 4381281), (9, 2434045), (15, 1460427), (37, 592065), (45, 486809), (59, 371295), (111, 197355), (177, 123765), (185, 118413), (223, 98235), (295, 74259), (333, 65785), (531, 41255), (555, 39471), (669, 32745), (885, 24753), (1115, 19647), (1665, 13157), (2007, 10915), (2183, 10035), (2655, 8251), (3345, 6549)]