19988914

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:342

約数の個数: 32

約数和(自身を含む): 33841152

約数和(自身を除く): 13852238

約数列:

[1, 2, 11, 22, 67, 71, 134, 142, 191, 382, 737, 781, 1474, 1562, 2101, 4202, 4757, 9514, 12797, 13561, 25594, 27122, 52327, 104654, 140767, 149171, 281534, 298342, 908587, 1817174, 9994457, 19988914]

約数ペア:

[(1, 19988914), (2, 9994457), (11, 1817174), (22, 908587), (67, 298342), (71, 281534), (134, 149171), (142, 140767), (191, 104654), (382, 52327), (737, 27122), (781, 25594), (1474, 13561), (1562, 12797), (2101, 9514), (4202, 4757)]