21605356

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{4243}}^1$

素因数の和:4333

約数の個数: 24

約数和(自身を含む): 40402880

約数和(自身を除く): 18797524

約数列:

[1, 2, 4, 19, 38, 67, 76, 134, 268, 1273, 2546, 4243, 5092, 8486, 16972, 80617, 161234, 284281, 322468, 568562, 1137124, 5401339, 10802678, 21605356]

約数ペア:

[(1, 21605356), (2, 10802678), (4, 5401339), (19, 1137124), (38, 568562), (67, 322468), (76, 284281), (134, 161234), (268, 80617), (1273, 16972), (2546, 8486), (4243, 5092)]