19561685

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{251}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 8380075

約数列:

[1, 5, 11, 13, 55, 65, 109, 143, 251, 545, 715, 1199, 1255, 1417, 2761, 3263, 5995, 7085, 13805, 15587, 16315, 27359, 35893, 77935, 136795, 179465, 300949, 355667, 1504745, 1778335, 3912337, 19561685]

約数ペア:

[(1, 19561685), (5, 3912337), (11, 1778335), (13, 1504745), (55, 355667), (65, 300949), (109, 179465), (143, 136795), (251, 77935), (545, 35893), (715, 27359), (1199, 16315), (1255, 15587), (1417, 13805), (2761, 7085), (3263, 5995)]