21311355

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{373}}^1$

素因数の和:687

約数の個数: 32

約数和(自身を含む): 36945216

約数和(自身を除く): 15633861

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 293, 373, 879, 1119, 1465, 1865, 3809, 4395, 4849, 5595, 11427, 14547, 19045, 24245, 57135, 72735, 109289, 327867, 546445, 1420757, 1639335, 4262271, 7103785, 21311355]

約数ペア:

[(1, 21311355), (3, 7103785), (5, 4262271), (13, 1639335), (15, 1420757), (39, 546445), (65, 327867), (195, 109289), (293, 72735), (373, 57135), (879, 24245), (1119, 19045), (1465, 14547), (1865, 11427), (3809, 5595), (4395, 4849)]