221786817

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{283}}^1\times {\mathrm{557}}^1$

素因数の和:917

約数の個数: 32

約数和(自身を含む): 344835072

約数和(自身を除く): 123048255

約数列:

[1, 3, 7, 21, 67, 201, 283, 469, 557, 849, 1407, 1671, 1981, 3899, 5943, 11697, 18961, 37319, 56883, 111957, 132727, 157631, 261233, 398181, 472893, 783699, 1103417, 3310251, 10561277, 31683831, 73928939, 221786817]

約数ペア:

[(1, 221786817), (3, 73928939), (7, 31683831), (21, 10561277), (67, 3310251), (201, 1103417), (283, 783699), (469, 472893), (557, 398181), (849, 261233), (1407, 157631), (1671, 132727), (1981, 111957), (3899, 56883), (5943, 37319), (11697, 18961)]