21786457

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 28514304

約数和(自身を除く): 6727847

約数列:

[1, 7, 11, 41, 67, 77, 103, 287, 451, 469, 721, 737, 1133, 2747, 3157, 4223, 5159, 6901, 7931, 19229, 29561, 30217, 46453, 48307, 75911, 211519, 282941, 325171, 531377, 1980587, 3112351, 21786457]

約数ペア:

[(1, 21786457), (7, 3112351), (11, 1980587), (41, 531377), (67, 325171), (77, 282941), (103, 211519), (287, 75911), (451, 48307), (469, 46453), (721, 30217), (737, 29561), (1133, 19229), (2747, 7931), (3157, 6901), (4223, 5159)]