21005655

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{2087}}^1$

素因数の和:2167

約数の個数: 32

約数和(自身を含む): 37283328

約数和(自身を除く): 16277673

約数列:

[1, 3, 5, 11, 15, 33, 55, 61, 165, 183, 305, 671, 915, 2013, 2087, 3355, 6261, 10065, 10435, 22957, 31305, 68871, 114785, 127307, 344355, 381921, 636535, 1400377, 1909605, 4201131, 7001885, 21005655]

約数ペア:

[(1, 21005655), (3, 7001885), (5, 4201131), (11, 1909605), (15, 1400377), (33, 636535), (55, 381921), (61, 344355), (165, 127307), (183, 114785), (305, 68871), (671, 31305), (915, 22957), (2013, 10435), (2087, 10065), (3355, 6261)]