21580916

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^2\times {\mathrm{563}}^1$

素因数の和:648

約数の個数: 36

約数和(自身を含む): 44438688

約数和(自身を除く): 22857772

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 148, 259, 518, 563, 1036, 1126, 1369, 2252, 2738, 3941, 5476, 7882, 9583, 15764, 19166, 20831, 38332, 41662, 83324, 145817, 291634, 583268, 770747, 1541494, 3082988, 5395229, 10790458, 21580916]

約数ペア:

[(1, 21580916), (2, 10790458), (4, 5395229), (7, 3082988), (14, 1541494), (28, 770747), (37, 583268), (74, 291634), (148, 145817), (259, 83324), (518, 41662), (563, 38332), (1036, 20831), (1126, 19166), (1369, 15764), (2252, 9583), (2738, 7882), (3941, 5476)]