21261695

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{563}}^1$

素因数の和:671

約数の個数: 32

約数和(自身を含む): 31836672

約数和(自身を除く): 10574977

約数列:

[1, 5, 7, 13, 35, 65, 83, 91, 415, 455, 563, 581, 1079, 2815, 2905, 3941, 5395, 7319, 7553, 19705, 36595, 37765, 46729, 51233, 233645, 256165, 327103, 607477, 1635515, 3037385, 4252339, 21261695]

約数ペア:

[(1, 21261695), (5, 4252339), (7, 3037385), (13, 1635515), (35, 607477), (65, 327103), (83, 256165), (91, 233645), (415, 51233), (455, 46729), (563, 37765), (581, 36595), (1079, 19705), (2815, 7553), (2905, 7319), (3941, 5395)]