20954913

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1\times {\mathrm{181}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 33196800

約数和(自身を除く): 12241887

約数列:

[1, 3, 7, 21, 37, 111, 149, 181, 259, 447, 543, 777, 1043, 1267, 3129, 3801, 5513, 6697, 16539, 20091, 26969, 38591, 46879, 80907, 115773, 140637, 188783, 566349, 997853, 2993559, 6984971, 20954913]

約数ペア:

[(1, 20954913), (3, 6984971), (7, 2993559), (21, 997853), (37, 566349), (111, 188783), (149, 140637), (181, 115773), (259, 80907), (447, 46879), (543, 38591), (777, 26969), (1043, 20091), (1267, 16539), (3129, 6697), (3801, 5513)]