21263641

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 27360000

約数和(自身を除く): 6096359

約数列:

[1, 7, 19, 29, 37, 133, 149, 203, 259, 551, 703, 1043, 1073, 2831, 3857, 4321, 4921, 5513, 7511, 19817, 20387, 30247, 38591, 82099, 104747, 142709, 159877, 574693, 733229, 1119139, 3037663, 21263641]

約数ペア:

[(1, 21263641), (7, 3037663), (19, 1119139), (29, 733229), (37, 574693), (133, 159877), (149, 142709), (203, 104747), (259, 82099), (551, 38591), (703, 30247), (1043, 20387), (1073, 19817), (2831, 7511), (3857, 5513), (4321, 4921)]