19900828

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{401}}^1\times {\mathrm{653}}^1$

素因数の和:1077

約数の個数: 24

約数和(自身を含む): 36807120

約数和(自身を除く): 16906292

約数列:

[1, 2, 4, 19, 38, 76, 401, 653, 802, 1306, 1604, 2612, 7619, 12407, 15238, 24814, 30476, 49628, 261853, 523706, 1047412, 4975207, 9950414, 19900828]

約数ペア:

[(1, 19900828), (2, 9950414), (4, 4975207), (19, 1047412), (38, 523706), (76, 261853), (401, 49628), (653, 30476), (802, 24814), (1306, 15238), (1604, 12407), (2612, 7619)]