257199371

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{523}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 320436480

約数和(自身を除く): 63237109

約数列:

[1, 11, 13, 19, 143, 181, 209, 247, 523, 1991, 2353, 2717, 3439, 5753, 6799, 9937, 25883, 37829, 44707, 74789, 94663, 109307, 129181, 491777, 1041293, 1230619, 1420991, 1798597, 13536809, 19784567, 23381761, 257199371]

約数ペア:

[(1, 257199371), (11, 23381761), (13, 19784567), (19, 13536809), (143, 1798597), (181, 1420991), (209, 1230619), (247, 1041293), (523, 491777), (1991, 129181), (2353, 109307), (2717, 94663), (3439, 74789), (5753, 44707), (6799, 37829), (9937, 25883)]