21091131

素因数分解:

$3^3\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:296

約数の個数: 32

約数和(自身を含む): 32313600

約数和(自身を除く): 11222469

約数列:

[1, 3, 9, 27, 67, 89, 131, 201, 267, 393, 603, 801, 1179, 1809, 2403, 3537, 5963, 8777, 11659, 17889, 26331, 34977, 53667, 78993, 104931, 161001, 236979, 314793, 781153, 2343459, 7030377, 21091131]

約数ペア:

[(1, 21091131), (3, 7030377), (9, 2343459), (27, 781153), (67, 314793), (89, 236979), (131, 161001), (201, 104931), (267, 78993), (393, 53667), (603, 34977), (801, 26331), (1179, 17889), (1809, 11659), (2403, 8777), (3537, 5963)]