21639735

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 41041728

約数和(自身を除く): 19401993

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 71, 117, 195, 213, 355, 521, 585, 639, 923, 1065, 1563, 2605, 2769, 3195, 4615, 4689, 6773, 7815, 8307, 13845, 20319, 23445, 33865, 36991, 41535, 60957, 101595, 110973, 184955, 304785, 332919, 480883, 554865, 1442649, 1664595, 2404415, 4327947, 7213245, 21639735]

約数ペア:

[(1, 21639735), (3, 7213245), (5, 4327947), (9, 2404415), (13, 1664595), (15, 1442649), (39, 554865), (45, 480883), (65, 332919), (71, 304785), (117, 184955), (195, 110973), (213, 101595), (355, 60957), (521, 41535), (585, 36991), (639, 33865), (923, 23445), (1065, 20319), (1563, 13845), (2605, 8307), (2769, 7815), (3195, 6773), (4615, 4689)]