18709808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{307}}^1$

素因数の和:621

約数の個数: 40

約数和(自身を含む): 39299568

約数和(自身を除く): 20589760

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 293, 307, 586, 614, 1172, 1228, 2344, 2456, 3809, 3991, 4688, 4912, 7618, 7982, 15236, 15964, 30472, 31928, 60944, 63856, 89951, 179902, 359804, 719608, 1169363, 1439216, 2338726, 4677452, 9354904, 18709808]

約数ペア:

[(1, 18709808), (2, 9354904), (4, 4677452), (8, 2338726), (13, 1439216), (16, 1169363), (26, 719608), (52, 359804), (104, 179902), (208, 89951), (293, 63856), (307, 60944), (586, 31928), (614, 30472), (1172, 15964), (1228, 15236), (2344, 7982), (2456, 7618), (3809, 4912), (3991, 4688)]