21306155

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7724245

約数列:

[1, 5, 13, 29, 65, 89, 127, 145, 377, 445, 635, 1157, 1651, 1885, 2581, 3683, 5785, 8255, 11303, 12905, 18415, 33553, 47879, 56515, 146939, 167765, 239395, 327787, 734695, 1638935, 4261231, 21306155]

約数ペア:

[(1, 21306155), (5, 4261231), (13, 1638935), (29, 734695), (65, 327787), (89, 239395), (127, 167765), (145, 146939), (377, 56515), (445, 47879), (635, 33553), (1157, 18415), (1651, 12905), (1885, 11303), (2581, 8255), (3683, 5785)]