20780199

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:149

約数の個数: 64

約数和(自身を含む): 36188160

約数和(自身を除く): 15407961

約数列:

[1, 3, 9, 11, 27, 31, 33, 37, 61, 93, 99, 111, 183, 279, 297, 333, 341, 407, 549, 671, 837, 999, 1023, 1147, 1221, 1647, 1891, 2013, 2257, 3069, 3441, 3663, 5673, 6039, 6771, 9207, 10323, 10989, 12617, 17019, 18117, 20313, 20801, 24827, 30969, 37851, 51057, 60939, 62403, 69967, 74481, 113553, 187209, 209901, 223443, 340659, 561627, 629703, 670329, 769637, 1889109, 2308911, 6926733, 20780199]

約数ペア:

[(1, 20780199), (3, 6926733), (9, 2308911), (11, 1889109), (27, 769637), (31, 670329), (33, 629703), (37, 561627), (61, 340659), (93, 223443), (99, 209901), (111, 187209), (183, 113553), (279, 74481), (297, 69967), (333, 62403), (341, 60939), (407, 51057), (549, 37851), (671, 30969), (837, 24827), (999, 20801), (1023, 20313), (1147, 18117), (1221, 17019), (1647, 12617), (1891, 10989), (2013, 10323), (2257, 9207), (3069, 6771), (3441, 6039), (3663, 5673)]